HelpMeRick.com is a widely used and well-respected site that has many tutorials related to social networking technologies. I found this tutorial helpful, particularly because it tipped me off to the potential PR and Advertising capabilities of StumbleUpon. Here is the link:
http://www.youtube.com/watch?v=3MXXjPG7RWc
One of StumbleUpon’s more remarkable assets for the information profession is that it can vastly increase online exposure for any repository or library. For example, a librarian at any given (public, special, academic) kind of library has the ability to do a number of things in order to direct fellow Stumblers to their site: they can give a “thumbs up” to their own site; write detailed site feedback about their site (which goes into the cell-cloud) to increase the site’s chances of coming up in Stumbles; and, they can regularly invite all “friends” to their respective site. This PR aspect of StumbleUpon is truly something information professionals can and should take advantage of for community-building and bringing new patrons in.
Sources:
How to stumble upon the internet. (2008). Retrieved November 24, 2009, from YouTube, personal user profile, http://www.youtube.com/watch?v=3MXXjPG7RWc