I hate to be the bearer of bad tidings but I think that Sarah is gone. Her last two sets posted were both taken last summer. Slippery when wet was shot on June 24, 2010 and Peachez retro lingerie was shot on August 19, 2010. The naughty elf BJ set was shot on July 8, 2010. Those recent Party Candids? Shot on August 14, 2010. That's from the metadata embedded in the photos when they were shot. That's a long time to keep shots on the shelf, unless you don't have any shots left because your model has quit, retired, gotten pregnant or whatever.
My guess is that they did a lot of shoots with her and to keep the website going they are releasing them as slowly as they can. I have to say that even the style of "her" posts here seems to have changed. Of course I could be wrong, its easy enough, all she has to do is start releasing photo sets again, at the rate she used to.
Look, I don't hold it against whoever the real girl in those shots is. I have enjoyed looking at her for quite a while and if she decided to call it quits that's fine with me, yes I'm disappointed but she can do what she wants. It's the nature of the game, the girls eventually get tired, the new boyfriend gets serious and doesn't want her to do it anymore, maybe she found God. Who knows? Of course whoever is running her site doesn't want to lose the business. They aren't about to tell you that she's gone and that they have a limited amount of shots left. Now for damage control "Sarah" will probably put in a post with some excuse, she had to take her dog to the vet or something. The reality is that in the digital age, post processing is a pretty simple and quick procedure so you don't have to do a Christmas Shoot for a porn website six months in advance.