Offer Personal Content Recommendations for Free with New MyBlogLog Plug-in - ReadWriteWeb
http://www.readwriteweb.com/archives/personal_content_recommendations.php
Hey, Delicious should finally do something like this: "When a MyBlogLog visitor visits a site with the plug-in running, the system looks at the tags that user provided for their interests when they created their MyBlogLog account. It then finds blog posts with the same categories or tags and serves them up in a widget. "
TechCrunch - Dig into the Music Long Tail - Pandora
http://www.techcrunch.com/?p=167
"What is it? It is a music recommendation engine and player and it is the future of discovering the long tail of music."