Where can I get a good set of IDE icons?
About using Standard Microsoft Icons.
The vast majority of developers out there don't know that Visual Studio comes with an Image Library. So here goes two links that highlight it:
About using Microsoft Visual Studio 2010 Image Library.
About using Microsoft Visual Studio 2008 Image Library.
You could use some of the icons from Eclipse = they are available under the same licence as the rest of Eclipse. I had a quick look at my local install of Eclipse and lots of the icons are in subfolders under configuration\org.eclipse.osgi\bundles
so you could search through the .gifs under there.
A set of icons with a liberal license can be found at http://www.famfamfam.com/lab/icons/silk/. They're not IDE specific, but there are lots of them, only 16x16 though.