If you are looking for Windows 7 Radeon drivers, go to ATI's site
here. They work well so far from what I can tell. You can also modify them with Driver Heaven's
Mobility Modder in case your mobile chipset isn't quite "officially" supported.
Considering the in-box driver in the recent builds of W7 dates back to 2006, it is nice to be able to take advantage of the newer display drivers.
Thankfully, there will be no radical driver support changes between Vista and W7, so Vista drivers should work with W7 without any changes.
I have yet to find a device that has a Vista driver that does not work under W7. With that said, I've finally been able to abandon the WIDCOMM/Broadcom Bluetooth stack for good and rely on the in-box Bluetooth stack. It is much improved. Ditto for HDMI/HDMI audio support.