The 2.6 kernel uses the g_ether driver for usb networking now. First, make sure to run
modprobe g_ether
ifup usb0
That should bring up your interface on the Z. Note that it is now
usb0 and no longer
usbd0. Next, follow the instructions on this site to get the windows driver installed:
http://www.handhelds.org/moin/moin.cgi/Win...UsbNetworkHowToyou may need to remove the old sharp drivers in order to get internet connection sharing to work. I use this setup to get my Z online when I am at work
(Just don't tell my IT guys.. )