[Discover] Twitter: What are you doing? http://twitter.com/ (social twitter community socialnetworking)
 [Discover] MySpace http://www.myspace.com/ (social friends community tools)
 [Discover] Facebook http://www.facebook.com/ (social friends facebook popular)
 [Discover] Flickr http://www.flickr.com/ (photography photo flickr sharing)
 [Discover] Last.fm - Discover new music with free internet radio and the largest music catalogue online http://www.last.fm/ (music community social radio)
 [Discover] LinkedIn: Relationships Matter http://www.linkedin.com/ (socialnetworking career community socialnetwork)
 [Discover] Delicious http://delicious.com/ (social delicious bookmarks yahoo)
 [Discover] Livemocha: Learn Languages and Practice with Native Speakers: English, Spanish, French, German http://www.livemocha.com/ (idiomas languages educación inglés)
 [Discover] Windows Live http://home.live.com/ (windows tools storage blog)
 [Discover] BlackPlanet.com - Login http://www.blackplanet.com/ (tools social socialmedia socialnetworking)
 [Discover] Use the Internet to get off the Internet! - Meetup.com http://www.meetup.com/ (social community socialnetworking network)
 [Discover] WordPress.com " Get a Free Blog Here http://wordpress.com/ (blog tool tools writing)
 [Discover] Google Reader http://www.google.com/reader/ (google rss blogs reader)
 [Discover] LibraryThing | Catalog your books online http://www.librarything.com/ (library social books tools)
 [Discover] Public timeline - Identi.ca http://identi.ca/ (twitter opensource community alternative)
 [Discover] Power.com - Todos os seus amigos em um só lugar. http://power.com/Pub/Login.aspx?ReturnUrl=%2fpriv%2fpower%2fhome.aspx (network orkut facebook aggregator)
 [Discover] Pandora Radio - Listen to Free Internet Radio, Find New Music http://pandora.com/ (music streaming tools radio)
 [Discover] StumbleUpon Reviews http://www.stumbleupon.com/ (social community search stumbleupon)