Dan Bricklin describes an image capture for a social bookmarking system for shopping.  The image capture makes a thumbnail of the image and uses it as a tag.  Neat idea...maybe applicable.

Research-oriented social bookmarking site. Some interesting categories for sharing content (articles, lectures, papers), the ability to send private messages and the ability to join groups.

A very very long annotated list of social bookmarking sites.

Another "catalog your own collection" site, but with a multimedia approach.

Another "catalog your own collection" site, but with a multimedia approach.

Listible is a new way to get relevant resources quickly.

By using Web 2.0 features such as AJAX, folksonomy (tagging), social elements such as voting/commenting and the listible's listonomy (listing), resources can be sorted in a way that will be digestible.