I really enjoy the clean lines in your stuff. Paint Tool SAI is pretty cool, but it's a Windows-only application so I can't even get a trial copy for myself. Also, I think the later versions of Corel Painter have similar looking lines, but they cost a lot of money so I'm stuck with Painter Essentials 4 for now.
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Anyway, here's some more art. This is the piece that actually got accepted for an art show in Chicago:

This was something that I was screwing around with in Illustrator last night. It's taken from an old photo, plus the original resolution of the photo was small, so I'm amazed at how non-pixellated everything turned out when it was rasterized:

Finally, this is my latest T-shirt design. Unfortunately, I designed it for a girls' T-shirt in mind: