This is a Protovis visualization of the sending/receiving stations scraped from the Wikileaks Cablegate cable messages (cablegate-201012212136.7z), using some documentation. I guess it's also a sort of tongue in cheek homage to graph artist Mark Lombardi. The code (such as it is) is available on GitHub. If you have ideas on how to make this better please leave a comment below.
Stations are grouped according to their country into a single node. The nodes are sized according to how many cables that country sent and received. The colors reflect the geographic region that the country is from.
Other excellent resources to review the cables include CableSearch and StateLogs.