decalgirl--
www.decalgirl.com now has skins for the Sony 505.
Looks like 87 skins are up. I know from my experience with the kindle that you can look around the site and if you see a skin you like, request one and they are pretty good about adding them for your device.
Some of the sony skins are pretty funky. Skulls and one had snakes (yuk!!!) but a mixture for all tastes.