Siphs

Siphs is an online system that allows you to share, store, and keep track of links you send to your family, friends and colleagues.

All the links you’ve sent are aggregated in your Siphs account, and a list of the most emailed articles appears on the frontpage, providing a kind of popularity rank. It is in beta now and u can register for free by filling out a form here

Furl is another bookmark organizing site which I mentioned earlier here