Almost - I managed to get them working with sarge (which is gonna become 3.1 i think)
I had a few problems with my /etc/modutils/alises files but after that i got it working without any trouble at all. The other thing i did was add nvnet into the /etc/modules file (i think - might not be that one, its the one that speicifed what modules to load at bootup)
Have you tried doing an lsmod an seeing if nvnet is loaded? Does it load if you `modprobe nvnet`? and then re-running dhclient?