Technorati Tag Search — Dave Sifry:
Technorati now supports Tag Search across leading Social software sites. Users can now search across user-generated tags and categories like tsunami across major weblog platforms like Blogger or Typepad, CMSes like Drupal, photosharing in Flickr, social bookmarking in del.icio.us and Socialtext wikis. By bridging islands of text, images and social networks through the words they use, the world live web just got a little smaller.
To try it, go to Technorati.com and add "tag:" to any keyword search, such as tsunami, cooperation or Office Buildings. What you will discover is people using the same words to describe and organize their blog posts, wiki pages, photos and links. My personal favorite of the moment is the poetry tag. I know a number of people who would use that tag as a great way to publish and also find other poets and their work, and the photos are very soothing and thought-provoking.
In other search engines, the only people using words to purposely be found are advertisers and search engine optimizers. With tags, people are adding value to the web in the same way they create links, accreting structure for their own, their friends and the web itself. This may change as tagging grows alongside the popularity of blogging and social software.
Tag support will be added to ecto.

