Mixed RSS feeds anyone?

A cure for my 194 feeds and 32 tabs in Netvibes?
One of the things that makes Facebook really good is the way they mix news. Meaning they don’t differentiate between news, people, activites, posts, photos…I can go on for ever. Instead the just list it based on when it happened. This drives traffic since the newsfeed is different all the time.
Then today, I thought to my self. Are there any rss feed tools like netvibes, bloglines etc that let’s you pic different RSS feeds and mix them into one feed based on date of post? I’d love that.
Anyone know of any product that does this? If not. Please make one.
Good night.