The blue social bookmark and publication sharing system.
Log in with your username.
I've lost my password.
Log in with your OpenID-Provider.
Good piece on Mashable worth a quick scan. http://mashable.com/2007/12/16/best-of-2007-trends-that-shaped-the-web/ Politics, Social Networks, Online Citizen Action, Ecommerce and Open Source. Other useful Google Trends to monitor.