Well, some of you geniuses decided to not even use A/C, which was completely nuts. Once ours were acquired, things were rather comfortable... so long as you didn't leave the room with 2 units in the windows!
The real killer was the two mile hike to YC for weekly dinners and meetings. Unfortunately walking to the T, taking it a couple stops, then walking to YC was the same equivalent distance, so we ended up just hoofing it over there in the heat and humidity.
1) Don't try to get through a Boston summer without AC
2) Don't try to code 18 hours a day on a 12" laptop
sub lesson to point #2: Don't try to code Rails 18 hours a day on a Windows laptop. It's a joke.