I actually just found out. I knew he was in bad shape when I saw him in 2006, but this is off of the radar. He's playing with Syd. He kept the "Battle with cancer" close within the PF Family. I always liked his "honky-tonk/clustered note" style of play. Noone else did it and IMO he's the 2nd Legend of the Hammond Organ to pass (Billy Preston's already gone).
RIP Rick
PS - Summer '68 was always one of my Richard Wright Fav's, if you haven't heard it give it a whirl. Now I'm sure David is glad he said yes to the Reunion at Live 8.