A discovery engine for RSS feeds
The personal bee seems to be a new interesting tool:
The Personal Bee is a "discovery engine" that helps you discover information from a collection of RSS feeds. In contrast, client-based RSS readers and web-based RSS aggregators merely catalog your RSS feeds. These tools are adequate if you subscribe to fewer than 5-10 news sources per topic of interest. Compared to RSS search engines, the Bee captures the latest "buzz words" in a topic area without requiring you to pre-specify search terms.
They seem to have a blog.