Maybe I should stop hijacking other peoples threads, but I'm kinda in the same category.
I work in photoshop CS3 and have done so for 5 years, I'm very young for a designer with 5 years of experience, but I just finished work with two other app developers and as it was a very positive experience I would love to do more of that kind of work.
As my signature says, if you are interested send me a message and I will give you my mail and we can continue discussion there. I do some work for free, but if you want several images or more complex stuff, a little payment (last time I just got gifted a bunch of iTunes songs) would be nice.
I will post a bit of my work as soon as the person I worked for tells me its OK, as the game is still unreleased and I don't really have much idea about how successful it will be, I don't want to spoil anything.