It really depends on what you consider "exclusive". Any third party title that says "exclusive" always has the chance of being ported over. So, the only true "exclusive" titles are 1st and 2nd party titles. Games like Gran Turismo 3, Syphon Filter and others are exclusives.
I\'m sure Sony has enough for this generation, but exclusives are becoming more and more important this generation, with alot of bigger titles like Crash goin\' multi-platform.
In sheer number of exclusives, of course Nintendo has everyone one beat.