I have a couple questions/comments:
- It's not exactly "secure", right? AirDropper has access to my file while it's "in transit" so AirDropper's really only "secure" if I trust AirDropper. You could, for example, be keeping a copy of everyone's files. So who are you, and why should I trust you?
- When I linked my Dropbox account I just gave you full access to my whole Dropbox. Ugh. Is there a way you can just get access to the directory in question?
These seem like obvious new user questions so you might want to add an FAQ, perhaps.