Whilst it is laudable to be looking to link up with schools overseas it makes the experience that much better for all involved if you have an agreed focus for the connection. You’re right Travel Buddies are neat but there are loads more opportunities for connection out there. A couple of places you might like to look are

Teachers Connecting a relatively new entrant into the field at http://teachersconnecting.com/

The Global Education Ning at http://globaleducation.ning. com/

Westley Field’s Skoolaborate at http://www.westleyfield.com/ skoolaborate/

The Flat Classroom project from 2008 at http://flatclassroomproject. ning.com/