arduino adk with toshiba tablet

Hey everyone

i want to control the arduino mega adk using both usb and bluetooth

the tablet ive been eyeing is http://us.toshiba.com/tablets/thrive/10-inch

but ive been reading on this site that using acessory mode, the only tablet that works is the galaxy tab

•a Nexus S, a Nexus One, or a Samsung Galaxy Tab 10.1 (as for 20110711 this still applies, there aren’t any other devices supporting accessory mode)

what exactly is acessory mode and would the tablet im looking at work

thanks