E Pals

Last term we were writing letters for our topic. We joined e pals, and the class all ended up with 2 or 3 e pals each. It was a very good way to put letter writing into an authentic context. An added bonus for me was to make contact with teachers from around the world. It doesn't matter where you are from, teachers are always good at sharing ideas.
check out e pals
http://www.epals.com/

It does take a few days to get your profile approved, and a few days to find schools to connect with, but once up and running it works really well.