Bored.com -
A place where you can play games, get free items, and even win contests.

Channel One News
This site offers entertainment for teens. Pop Poll: speak your mind with teens. Rate, review, gossip with students

Diary project
A place where to leave anonymously diary entries.

Fanfiction.net
A place where to write fictional stories about your favorite t.v. series, book, or even about your favorite music group

Teen Open Diary
A place to have your own public or private diary online