I use a program called Photogene. Possibly the addition of iPhoto to the iPad will do whatever you need it to, but I had already become used to Photogene before iPhoto for iPad was released. I know it's not a full-blown photo editor, and for some image work, I still need to fire up Gimp on my desktop, but for basic photo editing, I use Photogene more than any desktop solution. It crops, adjusts light and color levels, make collages, and uploads photos directly to Facebook and other services. I used to use iPhoto on my Mac for basic photo editing, but now I find it easier just to use my iPad.