It looks like waiting for the Core 2 Duo (Merom) update from Apple may have paid off in more than one way. The wireless card appears to be based on the Atheros AR5008 802.11n chipset, dual-layer DVD writing and the hard drive uses PMR!
Of course, if I waited another meager eight months or so I could have been running OS X Leopard on a Santa Rosa based system . . .