ive said it before, i'll say it again. the linksys wrt54g is the premiere platform for low-cost wireless mesh networking. at least i hope so :). its got the most promise. jim thompson said the atheros and realtek chipsets can somehow subvert or bypass the 802.11 MAC, impling other MACs can be implemented in software.
ive read a bit of the IEEE 802.11 spec. im trying to find a complete printed copy.