[Bluetooth] Controlling autonomous modular robot

Hi,

We are working on a semester project. The goal is to control 6 (maybe 60
in the future) autonomous modular robot with Bluetooth. You can see one
of them here --> http://birg.epfl.ch/page53075.html

The only thing to control is the servo position. In order to do that, we
only need to transmit 8 bits (-128 = full left, 0 = center, 127 = full
right).

We planned to use a standard Bluetooth USB dongle to communicate with
the modules (Zeevo System on Chip --> RF Bluetooth + ARM core). We also
wanted to use the Java Bluetooth API which let us access the L2CAP layer.

- Do you think it is possible to control up to 60 using L2CAP with a
small latency ? (Find the modules in the area, connect to each of them,
send data to each module one after the other)

- If the modules are master/slave capable, will a scatternet be
completely transparent for our application ?

- Is it possible to broadcast messages with Bluetooth (without having to
go in the deep layers of the Bluetooth stack) ?

Thank you

Cyril