I'm the owner of The Hidden Bookcase, a huge Sweet Valley and Babysitters Club site, which is at:
I've also just started a BSC and Sweet Valley Forum there!
Hopefully we can get as many fans there as possible, and have some fun! (Its also a forum for other book series's, such as The Sleepover Club, and any other series you like really!) I'd love to here from all the BSC fans!!