I've been on all kinds of 2.2 roms and I ha haven't been able to get apps on my SD card to work. Do I have to format the card? I'm running jrummys nextang now.

I believe it only works with certain apps. The developers of the different apps are putting out a lot of updates and if you read in most of their change logs it will say apps2sd supported or something like that. Just try going to the downloads section of your market and update as many of the apps as you can and see if you can move them to your sd card in the applications section of your phone. Hope this helps