From their site: Technorati is the recognized authority on what is happening on the World Live Web, right now. The Live Web is the dynamic and always-updating portion of the Web. We search, surface, and organize blogs and the other forms of independent, user-generated content (photos, videos, voting, etc.) increasingly referred to as citizen media.
Click the "Track this API" button on any profile page and never miss an API update, new app, or breaking news for that API again.
Add in favorites blog.
API key there is, username and password there are.
Simon, try some API libraries for Technorati written in PHP:
duck soup (http://www.kailashnadh.name/ducksoup/)
Janet Kellman, [url=http://rbytes.net/software/]software reviews[/url]