New tool for collaborative filtering

A new collaborative filtering tool aimed at rating news from RSS feeds has arrived: AmphetaRate.

AmphetaRate is a centralized ratings/recommendation service that provides personalized news and blog recommendations through a news aggregator interface. Using compatible aggregators, you can rate articles found in your subscribed feeds to discover unread articles that suit your taste, thus filling your news addiction.

They provide an API and I hope Bloglines implements this functionality soon.