I can’t believe such “blackmail” was posted — you can only use this on websites running ASP.NET (”no PHP et. al. allowed”)? Give me a break.

I imagine you guys have heard of this already, but just in case, there’s a similar icon set with twice as many icons and without the asp requirement:

http://famfamfam.com/lab/icons/silk/

“This work is licensed under a Creative Commons Attribution 2.5 License. This means you may use it for any purpose, and make any changes you like. All I ask is that you include a link back to this page in your credits (although a giant link on every page of your website really isn’t needed, contact me to discuss specifics).”