Most likely the biggest fansite there is for Shadow the Hedgehog of Sega fame. Includes game info, fanart, fanfiction, and media. Hosted at vk.net, although the plan is to redo the whole site and move it to it's own domain. :D
Miznotic Fantasy is the place to be if you're a fan of Japanese artist and manga-ka Junko Mizuno. The site includes a gallery of her works and information about her twisted fairytale trilogy, and more! Hosted at vk.net.
Sonic Shoppe is a catalog of sorts for Sonic fans to find Sonic games and merchandise. Looking for plushies and collectibles, come here to find different places carrying what you need and grab a deal!