And according to a post in a different thread VM do support Vista from today
http://www.cableforum.co.uk/board/34254271-post5.html
I went to install a VM modem for a guy yesterday who didnt have an enet card and the modem had dropped the usb connection totally so the new VM modems do not have usb . Any pc shipped with Vista will have fully drivers and Enet onboard so it will not be a problem. A few techs obviously have been through the Vista betworking management and can now offer support lol