> (they only support up through 802.11n, I believe)
Some newer wifi (iwx at least) work at higher speeds, but I believe this is mostly due to hardware functionality being moved to firmware. 802.11ac should be supported, but I haven't followed closely enough to know how well and in what drivers.
Sorry for my lack of proofreading, this was not written correctly. Functions that were formerly handled in software drivers are now being handled in firmware by many wireless NICs.
Some newer wifi (iwx at least) work at higher speeds, but I believe this is mostly due to hardware functionality being moved to firmware. 802.11ac should be supported, but I haven't followed closely enough to know how well and in what drivers.