In order to poll Twitter, each device registers itself on our server. Passes in the oauth token etc. So I can keep a consistent watch on things server side, but actually verify the legitimate sales (vs. pirated copies) the next day, once the daily reports are available.
I'll second that. It is more feature-rich than simplenote, which I prefer: voice notes, pictures notes, etc. There is also a plugin for Firefox extension for grabbing clips. I (and several of my friends) are very happy customers.