If you're interested in diapered anime girls, there's a few webpages I can send you to.
One is my personal art site. My art tends to be more soft-core and doesn't involve sexual situations. You can view it here:
http://www.melonandcake.comAnother site, run by Ai, is full of edited and hand-drawn art. I don't know if they have videos yet, but they have a ton of stories. Some of the artwork there is NOT PG-13, so follow this link at your own risk. There are some nice softer images there as well. It's a pretty good place to find other artists and get to know some AB people. These guys would definately know about more obscure diaper animes.
http://www.diaperedanime.comI do know there is one hentai floating around that features a white haired girl that is forced into diapers. From the reviews I have heard, it is not worth buying. As I have heard, it focuses more on bondage than diapers and a lot of people that have watched it say it is more disturbing than cute. I haven't seen it myself and I don't know what the title is. I wish I could help more!
I hope that helped ya at least a little bit!
~Boffii