Bebo
http://www.bebo.com
It allows you to keep in contact with your friends, school and favourite bands. It should win because it is innovative, simple and user friendly no matter what age you are.

Blogger
http://www.blogger.com
A Web-based blogging platform owned by Google.

Blurb
http://www.blurb.com
An online publishing service that lets you design books with text and photos, then get them printed and sent out.

CoveritLive
http://www.coveritlive.com
A live blogging service that can be integrated on nearly every blog or Web site. Information is updated live to all viewers as soon as the author or authors publish it.

Digg
http://www.digg.com
A social news site. Users submit stories then vote on them to promote some to the front page.

Docstoc
http://www.docstoc.com
A Web document hosting service. Users can upload and manage their documents, or view other people's documents right in their browser.

Dogster
http://www.dogster.com
A social network for dogs and the people who own them.

Drupal
http://drupal.org
A publishing and content management system. Users can add all sorts of content to Web pages through a system of modules.

Facebook
http://www.Facebook.com
A popular social networking service. Originally offered to college students, it later opened up its doors to anyone with an e-mail address.

Friendster
http://www.friendster.com
A popular social network and one of the first sites to offer user profiles and the capability to network with others.

Gaia Online
http://www.gaiaonline.com
A mix of social networking and massive multiplayer online role-playing games (MMORPGs).

Hi5
http://www.hi5.com
A social networking site with more than 70 million members worldwide.

LinkedIn
http://www.linkedin.com/
An online directory of people used both for business and social networking.

LiveJournal
http://www.livejournal.com
A social publishing community with just over 19 million different journals created since launching in 1999.

Lulu
http://lulu.com
A marketplace for user created goods. Writers, artists, and photographers can sell their creations through Lulu, which handles the storefront and publishing.

Meebo
http://www.meebo.com
A multi-network instant-message service that runs in your browser window and on mobile phones.

Myspace
http://www.myspace.com
One of the most well-recognized social networks in the world. It's also one of the most trafficked on the Internet.

Ning
http://www.ning.com
Allows users to create and manage their own social network using a modular design and toolset.

Plaxo
http://www.plaxo.com/
Aggregates activity from you and your friends everywhere they are on the Web. It's also an online calendar and address book tool.

Reddit
http://www.reddit.com
A social news site and community. Users vote stories up and down and have rich discussions in each story's comment section.

Scribd
http://www.scribd.com
An online documents host. Users can upload, search, and browse through documents right in their browser.

Stardoll
http://www.stardoll.com
Lets anyone play dress-up with virtual dolls. New dolls based on celebrities or other famous figures are being added constantly.

StumbleUpon
http://www.stumbleupon.com/
Half content discovery, half social network. It lets users rate content they like, and jump to new sites based on past ratings.

Tumblr
http://tumblr.com/
A blogging tool that works with all sorts of media and is set up to let users subscribe to, and re-share each other's entries.

Twitter
http://twitter.com
A microblogging service that lets users publish 140-character messages out to the world.

Typepad (and the MovableType platform)
http://www.TypePad.com
Six Apart's blog pushing tools. TypePad is a hosted blog service while MovableType must be hosted on the user's servers.

Vox
http://www.vox.com/
Six Apart's free blog service. Users can upload photos and push out posts to their own private or public blog.

Wetpaint
http://www.wetpaint.com
A free reference tool with which multiple people can get together and create dynamic wikis.

Wikia
http://www.wikia.com
A white-paper wiki service that lets site owners add wiki elements to their sites and brand them to match.

Wordpress (and the WordPress platform)
http://www.wordpress.com
Automattic's two blogging services. WordPress.com is hosted, while WordPress.org can be installed free of charge on a user's own servers.