Cassandra Calogera (not on picture page, but available for appointments) is here:

http://www.theeroticreview.com/reviews/show.asp?id=118685

I've also seen her reviewed and advertised elsewhere.

I've also seen some of the other porn stars advertised through E2K and the other Big Name porn escort sites. Generally speaking, the ladies there are actually escorting.

Does that mean the agency is above-board? Dunno. Never used them. But... the Porn Star board is actually one of the more informative boards on TER...

http://www.theeroticreview.com/discussion_boards/messageList.asp?boardID=23

You can often find out a lot about which ladies are available there. The mod's pretty helpful, too (he's kind of deluged right now with a project where he's compiling all the Playmates, Pets, models, car models and fitness models that are available, so it might take him a while to get back to you if you PM him.) He also doesn't allow agencies to post that can't deliver the goods (you'll notice if you search that this agency advertises on the PS board a fair amount). Also, as a rule, porn stars don't tend to get a lot of reviews, because their prices are a wee bit high.

Anyways, hope this helps.