I think something like this would be great. You've probably already thought of this, but just to note it down: it would be really nice if org-babel's notion of a buffer's 'session/process' played nicely with ESS's notion of the buffer's session/process. ESS keeps the current process name for a buffer in a buffer-local variable ess-current-process-name (or is it ess-local-process-name?). So one thing we will probably want to do is make sure that the Org Edit Src Example buffer sets that variable appropriately. [DED]

I had not thought of that, but I agree whole heartedly. [Eric]

Once this is done every variable should be able to dump regions into their inferior-process buffer using major-mode functions.