Empatico is a new site designed to help teachers have their students connect with other classes online.
There are a lot of others out there trying to do similar things (see The Best Ways To Find Other Classes For Joint Online Projects). Empatico seems a bit more structured than some, though, and that might make it more attractive to certain educators and less so to others.
You might also be interested in Links To The Joint Projects My ELL Geography Class Did With Classes Around The World.
Here’s a short video on Empatico: