Just chiming in, I probably wouldn't pay for $10 a month for this service (maybe I'm not the target market). I do use various messaging apps and it is annoying though.
This jumped out at me:
>we send each user a Jailbroken iPhone with the Beeper app installed which bridges to iMessage
I couldn't tell if that was some sort of joke or if it meant something different to how I was reading it?
Being open source is great, but to be honest I lack the time (and expertise) to see how all the integrations work. A page that describes a high level overview of how this works exactly might build more trust.