Friendfeed.com launched today. It's been in Beta for a while. Very cool at least on first blush. It aggregates a whole bunch of posts according to your settings. I set my Friendfeed to show del.icio.us, flickr, tech ronin and twitter posts for openers.
The people behind this are from but not currently of Google. This is moving towards what will be better when OpenID gains adoption. Check it out!