Top 10 web2.0 tools

This is a list of Top 10 web2.0 tools. Are they on your list? What's on your list?
http://www.thejournal.com/articles/23898
Here's mine (in no particular order). This is today's list, tomorrow I might change my mind coz I can (and probably will)!!

1. wikis
2. blogs
3. twitter.com
4. deli.cio.us
5. skype
6. LAMS
   
7. voicethread
8. wordle.com
9. tinyurl
10. befunky.com