Well, you're in luck! Since I'm taking a class in Designing an On-line class this semester, I'm supposed to be spending time seeking out websites for my project, so I painstakingly spent a little while skimming over all of them and seeing what they are all about. I was getting bored, angry, and frustrated, until #18.
The article describes SymbalooEdu as "a great way for teachers to share sites and resources with students". But it's actually more than that. It's a actually a Personal Learning Environment Tool. What's a Personal Learning Environment? Well, if you don't know, it's making a comeback. And I highly recommend that you read about SOCRAIT over at Teaching College Math.
For a short introduction to SymbalooEdu, either watch the video below, or head right on over there and get started like I did: bit.ly/jonsdash (A place in which I am going to start organizing the growing list of links for the tasks that I must complete daily)!