After A Free Forum Host?

www.Forumsland.com is my primary source. Though they don't have their own backup system, you can easily get one to crawl your site and load your materials to a backup for you. There are a vast number of skins automatically loaded for you to view through, each generally having two or three alternate skins for color options. I personally enjoy using them for my own gaming forums. I would suggest them if you're looking for something simple.