Inspired by the rainbow logo and tagline at the end of this classic commercial, I spent a few minutes on pixlr.com turning Chad Thorson's OSR logo into this stuff. This was primarily for my own amusement and as part of my ongoing efforts to suck less at graphical stuff. But hey, maybe you can get some use out of one of these. Or maybe you can go and do a better one.
I also had a version that said "Old School Ruckus" under the logo, but I'm not actually trying to make fetch happen.
(PS I don't have larger versions.)