I’ve also ordered the following accessories to get my BeagleBoard up and running (all ordered at Mükra Elektronik):
USB-Serial Adapter (you can get the drivers for MAC OS X and Windows here)
Serial Null-Modem Cable (9-pin d-sub to 9-pin d-sub)
USB 2.0 Mini-A Cable (for connecting the BeagleBoard USB OTG port to my MacBook as the power source)