I learned about this cool site from a mention in AOPA Flight Training Magazine...
The site is flyagogo.net.
Here's how the site describes itself:
flyagogo.net provides the aviation community with the most easy-to-use, interactive and graphical online flight planning tools, aeronautical charts, live weather, and aviation database available anywhere on the web. No registration, no proprietary plugins required, works with any modern web-browser on any platform.
Way cool! Check it out.
And, while I'm at it, here are some other fun flying resources:
Aviation Acronyms and Mnemonics (Check out his other cool aviation stuff at http://www.scottsasha.com/aviation/)
Tim's Air Navigation Simulator www.visi.com/~mim/nav/
Listen to live Air Traffic Control on your PC at www.liveatc.net/
Digg It!
Bookmark it!