The PS3 multi-platform developer situation seems to be improving. First Epic works with Sony to add Cell support for their engine, Fifa 2008 apparently will finally be the first EA game to use the Cell's SPEs and now Crytek is working on some "secret" stuff as well.
Combined with the availability of the Edge toolset to 3rd parties it looks like we'll have a lot to look forward to. First class 1st and 2nd party PS3 developers including companies like Insomniac and Naughty Dog have helped making the Edge toolset possible.