You rang?
Edit: I can work in both large resolutions and vector, I have the entire adobe suit. I don't have a set art style either, I'm pretty much 'not bad' at anything.
I've printed several T-shirts before and I can tell you it doesn't make that much a difference, as long as the size is good and rez is high. It's a little different if you're talking about those cheap ass 'heat sticker prints' you use on clothes, though.