If you love Twitter...or even if you don't, check out the post at www.teachthought.com, 100 of the Best Twitter Tools. Teachthought has organized the tools into categories.
My favourite so far for classroom use is in the "Groups" section (scroll down to #75-86): paper.li. Paper.li lets you create a daily newspaper from your Twitter feeds. There are other great classroom ideas under "Twitters", "Games", and "News and Research".
