Well I took the plunge and installed Win7 RC.  It works great.  Installed W@W and it works perfectly.  No PB kicks, no TS kicks, just getting it handed to me like usual.   Using the latest Win7 Nvidia drivers.  Make sure you update PB.

Get Win7RC here  http://www.microsoft.com/windows/windows-7/download.aspx

And vid drivers here http://www.nvidia.com/Download/index.aspx?lang=en-us

There are WHQL drivers here for your vid card.  8800 and up I'm afraid.