They're still in print, as far as I know.
There isn't a book yet, however. US Games keeps delaying bringing the book out.
The deck is available on eBay among other places, I think there's a copy of the deck for sale there now.
The PsyCards are my favorite oracle deck; less obscure than tarot, easier to read. Really, when you think of it, in 78 cards and 156 possible meanings (if you use reversals), there is a lot of room for repetitive and derivative interpretation.
I was thinking earlier today that I need to have my favorite tarot bag maker sew me up a nice bag for the PsyCards.
Bob