Man, hot ain't the half of it!  No info available at all from my research, and although Sonia and Tonya both look vaguely familiar, I can't place them.  And Carla certainly has Playboy-quality looks:

Brand new. The quality of the photography makes me nervous, like it is all "stock" photography, but in the links section of their site they reference a local exotic photographer who has a full site.

It just seems odd to pop up out of nowhere with 4 new hot ladies.