I put the beta on my macbook pro as a 2nd OS, and it didnt "need" any drivers. I finally got bootcamp installed (kinda) to get stuff like the webcam to work, and it runs great.
I have been using it exclusively at work to test our network and software with it, and have experienced no issues at all, with the exception of the video card driver, which I updated from ATI, problem solved. It is a lot faster than Vista, and you'll learn to love the taskbar, which I hated at first.