Hmm...cleaning out some digital backlog as I wait for a few things to finish scanning. Found two or three things that you may or may not already know about:
For those who are not sedentary beasts:
http://www.mapmyrun.com/ <---Haven't played with it much, but it is in my bookmarks for spring when I plan to try taking up the whole running thing again.
For those who are sedentary and spend most of that time at or near the computer:
http://www.hulu.com/ <---I've been hearing about it for a while, but haven't had time to check it out. Looks to be a very good way to catch some television from your PC. Just poking around the interface looks much smoother than most of the network sites.
For those with too many e-mail, chat and social networking accounts:
http://www.digsby.com <---This is awesomely useful. I never really check my MySpace account and occasionally things languish there for months. This lets you get status updates and utilize multiple services with one client. So far it is stable, doesn't seem to hog too many resources and I'm really impressed all around.
Enjoy!