Lifehacker - StumbleUpon the best pages on the web - Feature
Rated • 8 reviews • research, social media, stumbleupon • lifehacker.com
Good overview of why StumbleUpon is cool. Like one of the commenters on the site mentioned, I've been recently using StumbleUpon as a bookmarketing tool instead of using del.icio.us and as a research tool to find sites focused around my interests. It sure beats the "bookmark this page" feature in Firefox or IE.

