If your looking fro free icon sets then this link is a good place to start looking!
50 Amazing Free Icon Sets.

Found a excellent explanation on to how to create a Favicon for your website, and wanted to share it with you all.
Heres the latest one I created using this tutorial (look closely, there really small!)

A Favicon is a little custom icon that appears next to a website’s URL in the address bar of a web browser. They also show up [...]