NOTE: This service is no longer available
Saw a post on the RSS Bandit newsgroup about AmphetaRate, a recommendation engine for blogs.
Having worked on a recommendation and personalization engine on a large music community site (now owned by a company with a name you would exclaim if you were to find a huge stash of gold), I think the idea of a blogging recommendation server is compelling and if done right, very useful for finding new and interesting content.
The basic premise is this, you subscribe to a Recommendations feed from the recommendation server. Then, by rating blog items via your RSS Aggregator, the recommendations get personalized to your tastes. Currently, only one aggregator supports this service (RSSOwl).
I wonder if others will think this is worthwhile to implement in RSS Bandit.