This is Faith (aka Evelyn), one of the favorites on the "skinny girls" thread. If you want to see really, REALLY deep, scroll down to the speculum shots about 2/3 of the way down.
There's also a thread for speculum shots, on Peachy, at http://peachyforum.com/forums/thread/271139.aspx There's also apparently a subset under the "bizarre/heinous" title in XXX, but I personally don't want to go there . . .