I believe that for powering the device, your can use either a wallwart-style power adapter plugged into the wall with its barrel connector, or you can use a 4-pin Molex connector from a PC power supply, like were used to power the older PATA drives.
For communication with the device, you must use USB. You cannot power the device using USB.
do you reckon the power adapter will be included? i'm not sure where i could pick one up around here.
I don't believe the bASIC devices will come with a wall wart power adapter or at least Tom has not made mention of one yet. Its not listed on the bASIC order page.