What makes Bluetooth of interest for video is it's ease of use, low power consumption, and master-slave architecture.With the release of Bluetooth 2.0 bandwidth went up to 3Mbps. This was enough for limited video, but now with Bluetooth 3.0 the bandwidth goes up to 24Mbps.
Right now there are two very interesting products on the market which demonstrate where Bluetooth may go in the near future. One is the BT-1 camera. This camera costs $150, runs a respectable 4 hours on a charge, delivers 640x480 H.264 stream at 15fps and the reviews say that it has great image quality. The down side is that the range of the camera is only 30 feet and the only drivers that are available are for Macintosh. But for the price it seems to be a great deal. It even works with IPhone.
The other Bluetooth product that caught my attention is AirCable which claims to extend Bluetooth range up to 10km at very low power consumption. This solution is a low cost, low power, long range system of components that enables the creation of various wireless devices.
Their long range hub controller costs about $129 and they have a camera for $99. I did not like their camera specs very much as they had short run time, low resolution, and slow frame rate.
Assuming that the BT-1 camera generates about 256kbps of video stream, pre-compressed in H.264, then you could expect to be able to get 8 or more cameras per Bluetooth Aircable hub.
Now combine the two technologies into one and you get a good quality camera with VGA resolution, the ability to run 4 hours on a charge, a range of a thousand feet, point to multi point operation with support for up to 8 cameras per hub, a fast frame rate, small size, and really low cost. An entire system could be had for less than $300. Plug that into a netbook NVR or a smart phone and you have a very low cost long range wireless system.
All of the above is based on Bluetooth 2.0. Now just think about where this can go with Bluetooth 3.0 and the ability to have 24Mbps in bandwidth available.
Of course I am relying on the accuracy of the information on the vendors web sites. So there certainly could be something here that derails the usefulness of these products for surveillance, but they are very close to what the market is looking for.
I might buy these, kludge them together and see how they work.