How about a list of website that offer free icons, images and vectors for personal or commercial use? Oh, you like? Then here you go:
Fam Fam Fam (www.famfamfam.com/lab/icons/) Brand Spanking New (www.brandspankingnew.net/archive/2006/12/hohoho.htm) Pinvoke (www.pinvoke.com/) Sweetie (www.sweetie.sublink.ca/) Random Jabber (www.randomjabber.com)
At the Wikipedia Commons you can download a fantastic set of icons for free. The set is called Crystal Clear. Enjoy ;) For a full listing of the Icon sets available at the Wikipedia Commons website click here. Also, check out IconFinder, an icon search engine.