Quote Originally Posted by scalerobotics View Post
That sounds like all six in one second.....

One of the XBee modules like this: http://www.sparkfun.com/products/8664
fits the distance, legalities, and timing specs. It's only $19.00 at DigiKey.com, and is highly configurable.
If it is a 1 second burst containing all 6 sensors, I agree - this is ideal.