I'm thinking most apps will work but KisMac unloads Apple's Airport card drivers and loads a FreeBSD ORiNOCO compatible driver that results in longer ranges and abilitity to monitor "hidden" SSIDs.
Since the old Apple Airport cards are only ORiNOCO gold cards, what chipset are the new Extreme cards based on?!
Is it a Linksys chipset? (Rumor I'm hearing)???
This is the program I use most and I'm ready to upgrade my dual-USB iBook and can't decide between an iBook 800MHz with my old Airport card or a new 12" PB with a Airport Extreme card.