My 'In The Know' PXE expert says he's never seen a stack that supports any form of wireless PXE.
As far as configuration. Most devices require you to boot to an OS, and run the pxe configuration editor to change things like link speed, duplex. This chip might be one of them, and not have the full on 4.x (I think I saw references between 1.x and 4.x intel boot agent) configuration screen. Even if it had one, it would be pretty advanced to be able to edit the link settings (to configure wireless) at or before the pxe stack initiates.
So. I'm going to PXE over wired. 
I'll try again in a year to PXE over wireless. 
Thanks again for all your help! If anyone finds any information to the contrary, post it here.
-Ryan