Mine arrived yesterday and it after a stuttering start I have it working nicely. And yes you need NO drivers on the pi as it shows up as eth0 BUT...
A few caveats.
1. You do need a Windows PC to set it up - there's a Windows Setup App (provided on a tiny CD) you need to run to find the Vonets and programme in your Wireless Network Settings (SSN, WEP/WPA settings etc) - the first W7 laptop I tried stubbornly refused to find the Vonets on its Ethernet port - fortunately I had a second one which worked OK.
2. I can't get it to work as the 'source' for a little cisco 8 port hub (so I can hang a few pi's off it) - not sure why at the moment - will go back to that.
3. DHCP doesn't seem to work through it to my WIreless Router - I have staticly configured eth0 in /etc/network/interfaces - SCRATCH THIS, WHEN I SWITCHED TO THE WHEEZY BUILD THIS PROBLEM WENT AWAY
4. Power is interesting - its powered off a usb cable, so I plugged that into my powered hub and use the power plug to that hub as the master power on/off in the usual fashion - problem is, I think the pi boots faster than the vonets so the vonets isn't ready for when the pi attempts to initialise the network port and speak to an ntp server - a quick 'sudo reboot' obviously sorts that out but its irritating