SEOmoz, a States based Internet marketing and SEO consultancy has announced this year's winners from its Web 2.0 awards rosta. Myspace, Consumating, Stumbleupon, Technorati and Delicious are among the winners in the 'social networking' and 'social tagging' sections.

Check out the award site here.

What is Web 2.0? There is no really comprehensive definition at this stage. For us at 1000heads, web 2.0 is:

"an environment which empowers users through open source tools and innovative applications to search, organise, publish and share information."

However you define it, social media is at the heart of the concept. Read more on Web 2.0 here.