Quick question: Scenario #1: I buy a refurbished PB from apple.com, as well as a refurbished airport extreme card vs. Scenario #2: I use apple.com's Build-To-Order option and order a new PB with Airport Extreme card built in My question: do either of these options include the little screw-in antenna I would use if I plugged the card into a G5 tower at a later date? (Do the PB cards even work in a G5 tower?) Minor second question: because "Airport" and "Airport Extreme" have different form factors, am I correct in thinking that an original "airport" card is useless in any of Apple's current comp lineup? Thanks so much for your help!