Steve Jackson Games added some books to the GURPS Print on Demand title list.
Another of the books with my materials is up, too - the Dungeon Fantasy Companion contains my Magic Items book.
There are now 16 books available from CreateSpace or Amazon.com. I gather that SJG does a little better on the deal if you use CreateSpace, but if you've got Amazon.com Prime, it's just flat-out cheaper to the consumer to buy from them.
What is available right now are:
Dungeon Fantasy Companion
GURPS Infinite Worlds
GURPS Martial Arts
GURPS Mass Combat
GURPS Rogues (3e)
GURPS Warriors (3e)
How to Be A GURPS GM
If you want any of those in print, they're available. I have GURPS Ultra-Tech in POD, purchased from Amazon.com, and it's very nice.