Unfortunately it appears that the update is available only in Japan (if it’s available outside of Japan, do let us know!) for the SGPT111JP / S · SGPT112JP / S · SGPT113JP / S · SGPT211JP / S models, which means if you own the Sony Tablet S outside of Japan, you might have to wait before Sony rolls out the update for you guys. A USB adapter cable is still required for connect your PS3 controller to the tablet.
It also does not appear that the clamshell Sony Tablet P has received the update yet, but perhaps that will arrive at a later date.