Imagine if you could keep track of all of your friends and what they are doing on social networks, and at the same time your friends are notified about what you are doing? FriendFeed does that, and more.

You can share your notifications one of two ways:

• Enter the link to what you are working on manually, or…
• Link your social network settings, automatically, so when you do something at Yelp, it gets published on Facebook.

The setup was fairly easy — I did so in about ten minutes.

The list of networks they have so far:

Digg, Google Reader, Mixx, Reddit, Bookmarking, del.icio.us, Furl, Google Shared Stuff, Ma.gnolia, StumbleUpon, Gmail/Google Talk, Jaiku, Pownce, Twitter, Seesmic, Vimeo, YouTube, Flickr, Picasa Web Albums, SmugMug, Zooomr, Blog Blog, Tumblr, iLike, Last.fm, Pandora, Goodreads, LibraryThing, Amazon Wishlists, Disqus, LinkedIn, Netflix Queue, Netvibes, SlideShare, Upcoming, Yelp