The DVD burner is indeed the biggest downfall of the whole scheme. Especially when you take into consideration the fragility and power usage of optical drives. Last time i checked (30 seconds ago) you can get usb pen drives for under $5 on ebay. Find your local china town and hit up the shady computer stores were you can wheel and deal. The weight would be minimal, mailing price the same as a standard letter, reusable medium, rugged, and low power consumption. Combine that with an XO and you're rockin'!