This is cool stuff. But, what we really need for this to be done on _open_ platforms is for someone to code up a Bluetooth 4.0 alternate-PHY thing for some open source operating system that lets one glue the BT and wifi stacks together so they can dump data where appropriate.
Now, for the real feedback:
* bluetooth is lower power and shorter range, but it's also much lower throughput (compared to 11n) for the same range to an adjacent device;
* it overlaps the whole 2ghz range, so if you're doing a lot of bluetooth transmit, you're interfering with nearby 2ghz wifi devices;
* it also will be an "or" with the onboard wifi - ie, you can't transmit bluetooth and 2ghz wifi simultaneously on a lot of chips. There's an antenna switch that stops you from doing this;
* almost none of the open source stuff has sane transmit power or rate control hooks that would let you get away with much higher density 2ghz meshing - why transmit at full power if you're only talking to someone 3ft away?
I like what you're doing but a lot of what you're doing is tucked away in closed source blobs. It's hard to implement that on more open platforms.
Once people here get their (atheros!) mesh hardware doing much more useful things, I'm happy to sit down and do more brainstorming in relation to what you can do with the hardware and how you can do evil things at the 802.11 layer.
-adrian
(still hacking away at TDMA and 11n in his spare time..)