Small Embedded Computer with 802.11 for RC Car?

Milo_Mindbender asks: "For some time now I've been wanting to build an RC car with an on-board computer and an 802.11 link back to the PC in my office for telepresence experiments (and just plain fun). As I'm planning on doing this on my own dime, the big problem has been finding a reasonablly cheap and low power embedded system board with 802.11 and the right 'ins' and 'outs' to handle controling the motors (a parallel port at minimum)." Many seriously cool devices could come from an embedded 802.11 system, and I'm sure computer controlled RC cars are just the beginning. Has the Embedded Computing camp hopped on the wireless networking bandwagon? If not, what's the delay?

"I'm interested in doing two versions of the gadget, one using a system with a less powerful CPU that could do simple preprogramed moves and a second one that would have a CPU with enough power to do low-res video and two-way audio. I figure it would be a riot to remote drive one of these things anyplace in the office complex that has 802.11, stick a high-gain antenna on it and you could probably send it down the elevators and out into the parking lot! Has anyone seen an embedded system with 802.11 of either power level that might fit the bill?"