I just tested forward to an inum from GV: no, not allowed. GV states "country of forwarding phone is not your country"; peculiar, because I didn't think I owned a country. Leaving aside the tortured english that basically means they won't forward to a +883 number anywhere in the world, which, I guess, is one reason for not using GV (unless you think inums are a bad idea.)
I also verified
voip.ms's charges for DiD; they're USD.01/minute for the call centers local to me. That's not a whole lot for me (basically $0), but I guess if you get incoming 24x7 that's $460/month, so expensive even compared to US telcos ($40-$80/month if you are careful.)
Still, at this point I'm tempted to ditch Google Talk for DiD and switch to
voip.ms - for me this is USD.99/month for the number, USD.001/unit (1/10th of a minute) for calls and it has the real advantage that I can use the GV call screening (which does not work with Google Talk/Obi202). CNAM is USD.008/query, which is 8 call units, which is probably not worth it given the GV call screening which is much better than CNAM!
John Bowler <jbowler@acm.org>