Any site we can keep track of all accounts we have in different social networking sites in that ONE website?

[mosmef06]

There are a bunch of these out there but some of them stand out in particular. Here are the two best on the internet for aggregating all of your social networking sites:

http://www.iminta.com/
You tell the service the various social networks where you have accounts (delicious, flickr, YouTube, Lastfm, etc.) and the service creates a master list of everything you are up to on those sites. Your friends can then subscribe to your master feed, and/or you to theirs.

http://www.pageonce.com
You can use the service to retrieve information from many banking, social networking, airline, email, and shopping accounts such as Citibank, Facebook, American Airlines, Gmail, and Amazon. PageOnce takes the information appropriate to each account (once you give it your username and password, of course) and displays it in a Netvibes/PageFlakes-like layout.

Also, if you're interested in reading more about the latest in similar applications, techcrunch.com is a great resource. It's the place where I find most information on developing social networks, aggregation applications and things of that nature. It's basically the most popular blog on the internet covering internet start-ups.

Other good sources include:

Mugshot
Readr
30boxes
Spokeo