Insanely Great Tees has some pretty cool shirts. Chris Parrish was wearing the Jolly Roger tee last night, and I'm currently wearing Pixel Tools. And the wife even likes it. So buying one is highly recommended.
And the Pixel Tools shirt is providing a little bit of inspiration for me right now, since I'm working on bitmap editing in FlySketch. Hopefully when it's complete it'll do a little more than MacPaint did though! (MacPaint is where the pixel tool icons come from).