Once you pass about 5 reps it becomes an issue of endurance, not strength.  You may lose 1 or two if you stop doing them (as you see from your jump down to 7 from 10), but that's not a big deal, since you will easily get that back through minimal training if you want it back for some reason.

If you want to work on pullups specifically, to get to 10 reps, then I would suggest formulating a workout to do just that.  Once you are at 10-15 reps, you can incorporate 7-15 pullups into your warmup in some way - something like 3x5, 5x5, or 1x15 (assuming 15 isnt your ABSOLUTE max).

I think if you just do some 3x5 pullup work as kevin suggests you will see translation back into your endurance of the move up to 10 reps.

I am surprised you are doing pullups only once a week, though.  I remember when i was doing x-fit, between my warmup and the workouts i would be doing over 600 a week regularly. (3x15 = 45 every day for warmup adds up fast).  I was doing them kipping, too.  With WODs and WU i was doing well over 500-600 a week and sometimes get dangerously close to the 1000 mark depending on the WODs that week.

David, you love your kid right?  I think every kid deserves a swing set in their backyard.  A swing set whose top bar just happens to be about 7 feet high and perfect for pullups  .  Tell your wife you want to spend more time with your kid and that you feel a pull-up bar swing set would be a great investment.  I have a pull-up bar in my basement, but I find in the summer when my kids want to play outside, the best way to get some pull-ups in is to do them on the swing set while I am playing with my kids.  The kids just think it part of the playing and they try to do them too. 

Haven't logged my diet in a while. I've been pretty consistent, with the exception of occasional parties here and there.

I've made some positive changes, like no longer pigging out on weekends. Although on weekends it's less structured, I still keep to the Zone, although the scheduling tends to be off as the environment on weekends is less controlled. Weekdays, my diet now looks more like this:

6:20 AM:
   - 2 eggs (fried in olive oil due to time constraints)
   - 1/4 cup of coffee (down from 2 cups)
   - 2/3 bowl of Total (down from 1 full bowl)
8:45 AM:
   - 1/2 cup of almonds
   - 1 banana
9:30 AM:
   - Sip on water for about 30 minutes
10:45 AM:
   - 1 fruit
12:00:
   - Lunch: Typically Turkey, Chicken Breast, Fish or Steak with some form of veggies, occasionally some beans
   - 1/3 cup of coffee... I had actually shaken this, but social pressure at work, particularly because I'm leaving, everyone wants to go out for that coffee with me. Today I decided to just ask for some warm milk and keep them company... this should work fine, I hope
2:00 PM
   - Snack: 1 Hard Boiled egg, 1 fruit (typically apple, but this week I'm having 6 or 7 strawberries to change it up a bit)
4:00 PM
   - Snack: 1 Hard Boiled egg, 1 fruit (typically pear, but this week I'm having 10 cherries)
5:30 - 6:15 approx: workout
6:30 PM: Recovery snack
   - Typically some dried mango, maybe a bit of oatmeal
8:00 PM: Dinner
   - Salad with nuts, cheese, vinagre and olive oil. 5 slices of turkey, or like last night, I had a 1/2 pack of smoked salmon instead (serving size was 1/4 pack which had 12 grams of protein, I went for 1/2 pack cause that's how I roll!)
   - 2 or 3 glasses of milk

My weight has remained relatively constant despite the fact that I was partying all weekend and didn't get to workout from thursday to tuesday.

Whew! Last night I was spent. My entire posterior chain was feeling exhausted by all the deadlifts, SDHPs, pull-ups, etc

I'm finally realizing a few interesting things about Crossfit: Because exercises are multi-jointed, I often hit the gym not knowing what I'll do, and then just pick out a few exercises in a whimsical fashion. And no matter what you pick, you will end up working legs, back, shoulders, etc. Good stuff.

This is probably also why you don't need to work as many days as you would if you did isolated movements.

That being said, I do throw a little bench pressing here and there (gotta work on those chesticles), but that's pretty much the only variant.

Last night, I realized I had done all the X-Fit exercises, except: Cleans, Squats, Push-Press, so I set out to do these

Warmup:
4 rounds of:
- Air Squats: sets of 15 (feeling more comfortable with these. My knee isn't bothering me as much, so I upped the warm-up sets to 15 reps)
- Pull-ups: sets of 4
- Random upper body stretching, arm circulation, etc

Workout:
4 rounds of
- Cleans + Push Press
   1 set of 8 with 115 lbs
   2 sets of 6 with 135 lbs
   1 set of 6 with 115 lbs

Then I did a couple of sets of squats with 165 lbs, but my legs were done. I have not done any serious weight squatting since I inured my knee, so it even this weight was cumbersome

Not bad!

In a lot of those pix though, i noticed a lot of poor front squat form.  a lot of people were supporting the bar's weight on their hands.  Bring the arm up so the humerus is parallel to the ground -- the bar should rest on the delts.  When you hit the top, explode, the bar should bounce off on its own.

You are making the workout harder, reducing your power output and promoting poor front squat form.

Just my analysis, keep up the good training!

Good job on the Cindy improvements!  You'll be at a round per minute in no time!

As for your front squat form.  Your torso should be more vertical than in the back squat.  The back angle does not go nearly as deep.  Focus on getting the bar on your delts and the humerus UP and parallel to the ground.  NO weight should be on the hands - AT ALL.  My fingers barely even touch the bar when I front squat.

I am suspecting that your back angle is changing, making the weight go forward, so you are holding the bar with your hands and thus you have too much weight in FRONT of your body, not ON TOP of your body, causing you to drive from the toes.  The bar will be dictating your Center of Mass, and you need to keep that as close as possible to just over the hips (your natural center of mass).

Good cue for that is to keep the humerus up and focus on having the bar go straight up and down.  Let me know how it goes

here is a decent video...mostly because it really highlights the hand positioning.

http://www.youtube.com/watch?v=vd_WsfebYOg

Notice, the bar is on the delts, the hands support no weight.

Thrusters with light weight, up to around 135, can be held this way for most males.  When you get to the very top, explode (thrust!) your hip joint open.  This little burst will make the bar go airborne just a bit, where you can rotate your hands under it for a better pushing position.

Practice with the empty bar and going to the top of the squat explosively. You can practice by going into a quarter squat, not a full squat, to start. You will notice that the bar will bounce up a bit.  This is actually a push press.  Try to harness this power and then push it off your shoulders violently.  If the bar isn't bouncing on its own, then you're doing something wrong.

Vertical torso -> Hip extension -> Floating Bar -> PUSH!