The same MacBook Air owner who revealed the existence of the notebook's internal USB connections has managed to install a USB727 Verizon Aircard into the unit, as discussed and illustrated here.

For this hack, Jordan Bunnell disassembled both the MacBook Air and the USB EVDO modem, the soldered the modem onto one of the Air's internal USB connections. The hack also required the removal of both the internal AirPort and Bluetooth card in order to get the space and make use of the Airport antennas. He has also begun a forum thread over on insanelymac.com to discuss the process and allow users to add their feedback.

Brave by anyone's standards and if you've pulled off something similar on your own, let us know over in the comments or forums.