My BeagleBoard recently arrived from DigiKey and after resoldering an RS232 connector and downloading the binary images, I was good to go.If you're planning on only using the BeagleBoard as a USB gadget, connected to a PC, where the PC acts as the USB master, then you do not need to worry about a USB Mini A cable.
If you would like to network the BeagleBoard and a PC through the USB OTG port, then a USB Mini A cable is not necessary. You would use a regular USB Mini B cable which is the type used for most digital cameras.
