FeedShake

FeedShake is a new service for combining , filtering and ordering multiple XML feeds in realtime. It is useful for everyone having RSS managing problems. You can mix multiple RSS feeds , sort them by the date they are published, limit the number of items to list , filter the feeds by keywords and/or only have listed the items with particular keywords. Feedshake gives you a new feed , which can be used in any other RSS reader, browser with RSS support and other RSS services like FeedBurner , Syndic8 etc...

FeedShake also supports podcasting. You can merge podcasts with other podcasts or any regular RSS feed.

URL: http://www.feedshake.com