If you're ever in the pipeline for drawing Ork stuff, myself and a few others from The Waaagh Forum are on the lookout (desperately) for artists for
The Klanz Projekt. We get a fair amount of artwork, but not nearly enough. We've recently managed to get the permission to use a fair bit of stuff from Deviant Art, but we're always on the lookout for talented and enthusiastic artists.
It's mostly 40k, but there's a tiny bit of SG in one of my Codexes (Rebel Grots), but Orks are always fun to draw, if that's the sort of thing you don't mind drawing. We're trying to go for authentic looking, well presented rulesets, so as far as we're concerned getting Artwork, Play-testing and Miniature Pictures is pretty much as important as the rules.
Irisado has a good point that rules are the priority, but anyone going to the effort of putting out a ruleset should at least consider the aesthetics at some point during production. Especially outside of the Specialist Games community, where there is a massive prejudice against fan-rules. Adding good artwork, pictures and fluff really brings a project to life, and makes it easier to convince people that your work is worth something. In practice, the less amateurish it looks, the more interest it attracts.
There are a lot of fan-rules projects out there who want good artwork. It's just a question of finding them, really.