I started doing my situps on the incline bench with a 25lb plate. I go all the way back, half way up then side-to-side, back down and then all the way up as one rep. I did three sets of five today, abs feelin good!
This is my third week at a new gym (campus gym at my fiances university, signed up here since I'm on her campus more often than my own). It's a nice gym, I've been playing a lot of squash there too.