Yeah, actually I'd like to see this too. I saw one the other day that actually counted off as it was being uploaded (sorry, I dont remember where it was), but it was very usefull. I'd love to see this as I myself often get impatient and if not for my external modem, I wouldnt know if it was doing anything at all towards uploading my photo. Having a popup like in gallery could be usefull.
In fact for the amount of time that I used gallery to upload, their popup worked flawlessly. Maybe someone could go through their scripts to get an idea or two how to do it here reliably.