The second needs no further introduction. Sadly, TypePad just flat out refuses to display the image I so carefully cropped and uploaded (three different times), so you'll just have to go over to the Penny Arcade Store right now and see it for yourself. Rock.
This is yet another reason I love being a geek. We get stuff like this, while the cool kids are stuck with the same sports logos and brand names everyone else buys at the mall.