BitsCast looks interesting

As described on its site:

BitsCast is a versatile RSS reader/database/aggregator and podcast receiver/player designed from scratch to support the latest RSS technologies, including podcast and vblog. It features a powerful database query tool supported by Microsoft JET engine, a seamless integration with webpage browser/media player for news or music/video experience, and a full suit of tools to manage downloaded media files.

BitsCast beta. Check out the logo. It's an orange square. Two tiny picky things: 1) Let's hear who's behind it, and 2) It should be "an" before RSS, not "a."