While I have been resisting the move to using twitter, my favourite website as a resource for my ESL classes – Behind The News (BTN) – now has a twitter page :
http://twitter.com/behindthenews is twittering with some of their behind the scenes pics as well as comments.  I’m still not sure about using it in my classes – but I’ll keep watching it! It’s even possible to add a little code that will insert one of their pics into your own website – as you’ll see below in the “whispering sweet nothings” photo – looks like fun.