The educators group on Diigo now has a linkroll which will allow you to share things. The power of this is that if you are a science teacher, you can filter everything and only share science. Same for all subject areas.
I've turned on preapproval for this group to keep the spam out because we are approaching 500 members in this group. Remember, when you bookmark to diigo, check share to a group and then pick educators and at least one standard tag (you can use more.)
Great newcoming blogger. EstieC uses hyperlinks very nicely and has a nice writing style. Here, she reflects on the importance of commenting and is also part of one of the best pd projects that I've seen in a long time: the 23Things project out of Atlanta. A great model.