My pal Linda Jenkinson, a stunningly talented Web designer, graphic artist, and content writer, stepped up when I asked her if she could knock out some logos for the Occupy folks to use. She says they're free to use, so have at them!
Again, all credit goes to Linda, not to me. She can be found online at Shyflower.com and at SitePoint, where I first met her.
There are three variants. Use at will!