The Fujis are great films, good saturation and contrast.
The Impossible Project will focus on reviving Polaroid's 600 series integral films. They won't look at peel-apart films, at least initially.
Fuji also has a line of integral films, called Instax. They work only in Fuji Instax cameras, not in Polaroid cameras. It's fun film though, good colors, etc. It comes in two sizes, the mini, which is business card-sized, and the wide, which is larger. Only the wide is distributed in the US, and even then it's hard to find. I buy the mini film on Ebay and love playing around with it.