Most other text editors that I have used allow you to type in to the are where the output comes out. Eclipse works like this. Scite works like this (I am guessing Sublime is the same under the hood as Scite, it looks like Sublime uses the scintilla lib like Scite).
Ah OK, sorry, I just thought it looked a bit like it might use scintilla.
Do you think it will be possible to add this feature though, it would be really useful. As at the moment I am editing my code in Sublime and then running it in scite or eclipse, which is not a very efficient way of working, be good if I could do it all in sublime.