Take a look at digieducate!

With the close of the Thinkfinity Community as an umbrella for the Content Partners and their groups, a Symbaloo site - http://digieducate.symbaloo.com - has been created for easy access to the Content Partners' resources. Symbaloo.com is a visual bookmarking and sharing tool. The application acts as a personal learning environment. If your resource has a URL, it can be a link with the Symbaloo site. If you are an educator, I recommend creating your own Symbaloo at http://edu.symbaloo.com. Then you can create a bookmark to http://digieducate.symbaloo.com on your own Symbaloo site.