Regator has launched to the public - check it out. 

The value proposition of this type of service is that it enables you to expand your reading list by seeing what others who are into the same topics or industries are reading. You are only as sharp and informed as the depth and breadth of your reading list. With your own RSS Reader that pulls in only the content you have subscribed to you may not be widening your horizons as much as you could be.

From Regator:
How is Regator different?
Its blogs are hand-selected by real human beings, who choose them based on their good writing, original content, frequent updates, and relevance. But Regator’s editors don’t handle everything (there’s only so much caffeine a person can take). Our users’ actions create top rated, most viewed, and most commented pages. And complex algorithms create the aptly titled What’s Hot List, which keeps you up to date on what the blogosphere’s writing about at any moment.