xactly what in http://www.ieee802.org/16/docs/03/C80216-03_07.pdf could possibly be a reasonable topic for the IETF to consider?
I look forward to seeing the IEEE reinvent the network layer and put it _below_ the link layer. This should be fun.
(What else than a network layer would you call something that resolves "end-to-end" addresses into next hop addresses, which is necessary to navigate across the mesh. This would also need some sort of routing protocol and a hop limit field.)
Obviously having wireless mesh nodes route IP would be much too simple.