The bridging is quite well explained in here.
At home my DSL-router runs a DHCP server. I set up the bridging interface on the PC and the usb0 interface on the N800 to DHCP. The InternetTablett did not aquire the needed address. Setting it manually to a reasonable value lets me open a ssh session from the PC to the device, but a wget to my DSL- router from the N800 gives me "no route to host" ... Strange as it is the same ip network.