Dunno how many people here shoot in RAW format but this little Windows addon might save you some time when browsing your RAW images.

http://www.microsoft.com/windowsxp/using/digitalphotography/prophoto/raw.mspx

EDIT:
I forgot to say that this will cache your images so it will not take forever to load each time you want to browse through.
Bad thing is that it will not show full EXIF.

I had heard about this but as with most Microsoft stuff remain wary.

I use Phase One usually to view/process photos and Iview to catalog files.

Speed of thumbnailing would be a factor for me as my raw files go from 15-25MB and in some of the different software available they just run too slow.

Have you tried it?

Yea, I'm using it but only just to quickly look through the folder.
And that's all this is doing, it adds ability to see RAW images in Windows Explorer.
I just hated opening PS or Picasa just to find something quickly.