I just got an obi100 (2 actually, one for me and one for my mother for mothers day) and am using it with google voice to get free inbound and outbound calls via sip over ethernet. No lag, and free, free, and once again, FREE!!

Can't believe google offers free inbound and outbound calling, and that with one of these obi devices and a ptsn handset you can setup completely free voip.

Pretty cool device, i'll have to try your setup on my n900, thanks for the guide .