I like it so much I built an RSS search engine.
http://rssident.com
It's still a work in progress but I will be adding several new features soon.
For any of you that need jobs this is an easy way to find them:
http://rssident.com/mash/?t=job&e=java
http://rssident.com/mash/?t=job&e=ruby
http://rssident.com/mash/?t=job&e=php
Or by individual feed:
http://rssident.com/feeds/?t=job&e=java
Right now it's only indexing feeds I added but soon anyone will able to add whatever feeds they want.