We use it on my site (
NaughtyAlysha.com),
AmazingTy.com, and
ExtremeMissy.com. My site and Ty's have been upgraded to 4.0... mine is working great, but there is a problem with Ty's... the thumbnails aren't being created by the program. A minor issue, but a pain in the ass nonetheless. We're still trying to figure out what the problem is, but in all fairness it appears to be a server issue.