I believe it is Psychiatry Online.
I personally didn't feel like I wanted it, partly because the price, but also because IMHO, Psychiatry, while an extensive field is much less info than other fields such as Medicine. I felt that the problems you encounter in psychiatry 99% of the time are handled quite well in Kaplan & Sadock and a good attending to answer your question.
Medicine on the other hand--well Up To Date was needed. There's too much info and too much progress going on. Harrison's, the equivalent of Kaplan & Sadock for medicine is too much to read. UTD often had better info than the attending.
I haven't tried psychiatry online though so this could be a case where had I actually tried it, I might've liked it. It'd be nice if someone here who used it could give is their experience with it.