Holy crap, just found these things in my Visual Studio 8\Common7\VS2005ImageLibrary folder. In there you will find a zip file with about 800 images to use in your apps. Unfortunately these all look to be 16x15 in bitmap format and not png or gif for the web, but hey, it's a start. This is something I've been complaining about for years. Should be great for winform toolbars, but not so useful for the web.
No new icons though. It looks like giving applications the rocket ship icon will still trendy.
Post Script: As I finished typing this up, this movie popped up in my RSS reader as an introduction to the VS 2005 Image Library. Sweet!
Uhm what do you mean no new icons? Most of the new Whidbey toolbar IDE icons are there and all are there with the XP look... It looks like they've basically given us all the icons used in the IDE plus some of the Office icons.
Converting icons to other formats is pretty painless. Check out IconLove which is an icon editor that lets you import and export real easily and set transparency nicely with a few mouse clicks.
I think it is a great resource, worth calling a discovery. It can be so hard to find such large number of windows based images for free.