A community of interconnected photo diaries and blogs... Fotolog

Allows users to send text-based posts to the website, via short message service, instant messaging, email, or an application such as Twitterrific. For SMS, for the U.S.A. and Canada and a UK number for international use... Twitter

Allows users to send messages, leave comments, browse photos, watch videos, play games, give tags and chat... Tagged

A web browser plugin that allows users to discover and rate webpages, photos, videos, and news articles... StumbleUpon

Users can create a microblog and connect friends, posting from the web, by SMS, or from desktop clients... Jaiku

Social networking and discussion site operated by Google... Orkut

A service for journals and blogs, that also offers privacy controls, photo storage, publishing tools, style templates, and online communities for many interests... LiveJournal

Offers a profile page, a friend request feature, photo storage, music reviews, video, and email... Hi5

General Anime, Manga, and video game discussions, a links database and a fan-art gallery. Lets members create and customize characters to represent themselves... Gaia Online Community

A global social network that emphasizes friendship and the discovery of new people. Search for old friends and classmates, stay in touch with friends, share photos and videos. Also in Simplified and Traditional Chinese, and in Spanish... Friendster