Two possibilities arise- first, if you read feeds via a “river of news” option (show me all items, newest first, regardless of what feeds they came in) then this could drastically turn around that experience. I am not sure whether bloglines even gives you this option or if you still have to read whole feeds at once – but Newsgator.com allows this and it’s great.

Second, if there was the power available to do this (I’ve tried and my limited tech skills can’t quite make it happen) you could create unique channels within this glob of feeds like “give me a feed of items containing the word ‘RSS’ or ‘environmentalism’ across all of these feeds”. That would be great, wouldn’t it? I tried taking these feeds through the following steps, but servers timed out every time I tried to set it up: OPML to RSS, RSS filtered by FeedDigest, display feed in one of a variety of ways. Could make this happen for 5-10 feeds, but don’t know how to make it happen for 100+. Doesn’t it seem possible, and more important, valuable – though? Go mine feeds from various link lists, then splice together and filter for key words and you’re creating community newswires as big and specialized as you’d like. I’d like to do that. And I’m sure there are other things this OPML file could me used to do too.