So what you're suggesting is that the app would work something like this, right?:

1) Snap a picture
2) Do some simple editing if desired (brightness/contrast, flip/rotate)
3) Type or sketch optional captions or notes
4) Save and/or send to one or more contacts

As far as stamping GPS info and timestamps, maybe it would make more sense to have it add those textually underneath the sent photo. (I'm assuming we want it to send it by email)