It's a (high school) project I started and never finished, I even had a page about the concept but the domain expired and I cba to renew it really.

https://gitorious.org/bt-messenger/bt-messenger

No debs available right now.
It uses a mesh of devices, so there shouldn't be any limits on distance or number of devices.




Needs Qt Mobility 1.2, the UI changed a bit, it's not very stable.