Looking for a Skype-Multicultual Exchange

I'm looking to set up a cross-cultural exchange between a 4th or 5th grade class at my school and a class in a foreign country (English speaking, though). My 4th graders study from Explorers through Civil War Reconstruction. My 5th graders study from Civil War Reconstruction to present. I was thinking of a discussion between my class and a class in England about the Rev. War might be interesting, but I'm open to anything. It could be a book discussion in response to a mutually read class book, but doesn't necessarily have to be. Anybody game or does anyone know where I might find someone who might be interested?