Just yesterday, yes less than 24 hours ago, I was reading the news feed from a group blog and desperately wishing I had one of these so I could filter out the most obnoxious of the group.
And today, via Boing Boing, comes a link to FeedRinse, a service that “that filters the RSS feeds you subscribe to, hiding items that match keywords or authors you don’t want to see.” Yes!
Only trouble is, the free version is very limited; otherwise you have to pay.
But surely an open source version can’t be that far away? (Oh, please someone build this into FeedOnFeed Redux, please.)