Thumbtack by Microsoft Live Labs - Clipboard in the Cloud with Sharing Features.

Thumbtack is an easy way to save links, photos, and anything else you can find on bunch of different Web sites to a single place.  Grab the stuff you want, put it into a Thumbtack collection, then get to it from anywhere you can get online.  Share it with your friends, or just keep it for yourself. It’s way easier than sending a bunch of links in an e-mail, and even easier than setting lots of favorites in your browser. 

Nice! A cllipboard in the cloud with sharing features.

It's just an experiment however, so it might not be around forever.