I was planning on making a thread like this, just never seemed to have the time. :)
There are actually quite a few vaporware titles for the PS3 that havent been canned yet, and also quite a few titles definetly still in development:
(All exclusives)
Airtight PS3 Project [Unnamed]
Angel Rings [Working Title]
Aqua*
Big Time Revenge
Brave Arms
Chain Limit
Coded Arms Assault
DC Universe MMO
Dreamers
Metro 2033: The Last Refuge
Project Psychic
Redwood Falls
Rengoku The End of the Century
Returning Alive
Rockstar Old West PS3 Project
Zipper Interactive PS3 Project
I'm not saying you should include any of them, I'm just adding them to the thread for the sake of interest.
*You could possilby add PSN titles to your list, which would include titles like Aqua and Flower (From the developers of flOw).
Redwood Falls is almost certainly vaporware.
Titles like 'Metro 2033: The Last Refuge', 'Chain Limit' and 'Brave Arms' actually have screen shots, but nothing has been heard about these games for over a year.
Essay Pro