An old parkour friend of mine started doing 10 pushups on the hour every hour he was awake. Then after a week, he would move up to 11, 12, etc. When he got to 25, he started over with inclined pushups. If you're into rock climbing, you could instead switch to tri-pushups or fingertips. It makes for a really good break from whatever you're working on during the day.
I could never quite get on it due to my classload, but he does probably 100 handstand pushups a day.
Another hackerly exercise page: http://www.shovelglove.com/
Apparently John Walker (co-founder of Autodesk) wrote a book on weight loss taking an engineering approach (The Hacker's Diet, http://www.fourmilab.ch/hackdiet/www/hackdiet.html). I wonder if anything like that has been written for strength training?
The 100 push-ups plan seemed to appeal especially to hackers, but while it seems like a good start it would be nice if it were a bit broader in scope.