I've been hoping for this for a long time aswell. For those of us who need to transmit quickly it would save us taking an image out of Photomechanic, even possibly allowing us to make the edit, amend caption and FTP workflow easier.
I appreciate that others don't want to see this but then they probably want something that I don't (for example I'm not fussed about the cataloging software being developed having long since set up my own system) My hope is that one day very soon somebody at Camerabits can come up with a way of including this request, and FTP from the caption dialog, in a manner that pleases us all. Maybe it could be an editing window that opens similarly to the preview window but for Levels and a couple of other basic editing and proofing tools such as sharpening and rotatable crop ? (I know there are sharpening options elsewhere in the programme but I would rather they were available and controllable at the editing stage)