what sort of images do you want?
Character animation, static/animated tilemap images (32px*32px) of various themes, bitmap fonts... the usual really, and if something crops up which I think would be cool in a game, then it would be nice if the artist in question to accommadate it within a reasonable time scale (Obviously, at a cost)
But alas, its easier getting a reliable plumber than an artist! ;)
Dabz