Paul C Buff and his band of alien bees have come out with radio transmitters. The transmitter is only $59.95 and the receiver is $69.95. If these babies work as well as they claim they do, they'll be a great alternative to the more expensive Pocket Wizards. Here's the webpage: http://www.alienbees.com/cybersync.html
If anyone gets a set of these, please let me know.