An update for anyone following this little project:

• We now have a fair number of users (>1000 android installs, about 600 of which are actually using the lora devices)
• App and device code is fairly stable and a few devs are happily adding features/fixing bugs (though we'd like to have more collaborators)
• We have a fairly active discussion forum, with about 2000 daily readers.
• One manufacturer now sells devices with our software preinstalled (or you can buy from various other manufacturers)