I've got an iPad and do a little quick editing on photos I've taken - I don't get much time to use the laptop (kiddies!) so keep it simple.
I use Photoforge2 which has worked well for me so far. The only issue I found was that the RAW files weren't displayed clearly. So I now shoot in JPEG and RAW (only backup the RAW) and transfer to iPad using the connectivity kit.
I'm wondering what, if any app, you use to edit photos on iPad (if you do). At the time I got Photoforge, it was a toss-up between that and Filterstorm Pro. Has anyone used both?