The IEEE 802.11 Working Group has passed a major milestone in the development of IEEE 802.11s(TM), "Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: Extended Service Set Mesh Networking", by voting to confirm a single proposal as the initial basis for the IEEE 802.11s standard. Many additional steps, which will include technical changes, are necessary before this standard becomes final; but this vote sets the baseline from which the group will work. Once completed, IEEE 802.11s will provide an interoperable and secure wireless distribution system between IEEE 802.11(TM) mesh points. This can reduce backhaul and installation costs. It also will extend mobility to access points in IEEE wireless local area networks (WLANs), enabling a new class of IEEE 802.11 applications that require untethered infrastructure.
See the IEEE website for more details with regards to this development related to wireless mesh networks (Wikipedia).