If you’re into high-pointing (and who isn’t?), you might enjoy this: Summitpost.com’s list of the high points of all 50 states. I found that link at the blog for America’s Roof, which ups the ante by including a list of the high points of all U.S. territories (all my Guam readers will be thankful). Another America’s Roof post: A book listing the county high points of all 50 states.
There’s an excellent Google maps mashup too, the US Highpoint Explorer, here:
http://www.deepgorge.com/maps/peaks.html