I just got a email from CreateSpace notifying me that they did away with the Pro Plan. Looking over their site it looks like they decided to operate more like Lulu then the weird byzantine setup they had before. They have a cheaper base price and more format sizes than lulu but offer a different set of royalty rates that you will have to review. For $25 per book you can get expanded distribution which has the best royalty option of anything I seen for PoD although I think it requires the use of an ISBN for the book.
Also unlike Lulu it appears their method of selling online is to have the author create a estore and customize it's appearance. Doesn't look much more difficult than setting up with Cafe Press. That setup offers the best royalty option outside of paying for Extended Distribution.
It good to have more options when it comes to Print on Demand.