So do we believe the new Firefox OS will be the way forward, as a good alternative open source OS? I haven't looked into it much yet, and the hardware of the ZTE is severely underpowered at the moment for my needs, but if this is truly open then I can see myself getting on board, even flashing an Android device with it (if the hardware allows).

Didn't know about F-Droid, that's the kind of marketplace I think that is the best of both worlds, open source but verified by community members.