Also, I have a link over in Blogs I Peek At called go2web20. This is a blog hosted by the website of the same name. If you visit the actual website, you will find a complete directory to most, if not all, of the free services/websites available. In case you don't know, I teach computers at the middle and high school level. I am also teaching video editing this year. With $$ always tight in the school system, we often do not have the funds for new software. I often use some of these websites to spice up my lessons a bit! Many of my favorites listed below I just use for personal use.
Project Playlist (create a list of your favorite songs...and much more)
http://www.hulu.com/ (watch tv episodes, movies, and clips)
Snapfish (photo sharing website)
Shutterfly (photo sharing website)
Google Docs (share and collaborate documents)
Splashup (online image editing)
Dropshots (online photo/video sharing)
Picnik (online photo editing)
VoiceThread (hmm..hard to describe it all)
Smilebox (Create E-cards, Slideshows, etc.)
del.icio.us (organize bookmarks by tags)
Survey Monkey (full feature online survey tool)
Okay...I could just keep going and going! So, if you are looking for more, check out the link mentioned above or click on the picture!