Everything seems to be working for me so far. Just use drivercleaner if you need to go back to older drivers. I recommend using drivercleaner between driver updates anyways. Just be carefull as its default setting will even remove your video install files, even your download files.
I haven't done any performance testing to compare yet but my dvd playback works unlike with the omegas (its not just an omega driver problem, its all the newer mobility catalysts after 4.7 or 4.8 I think, though somehow sager found a workaround)
I just played the demo of bloodrayne2 and it ran fine. I like her outfit :-D can't believe they are making a movie based on it and the chick from T3 is the main character.. I'll be there opening night
