Have got about 6 or 7 positives so far and passed on the script. Couple of abusive emails (whatever!) But one service provider who franchises his VoIP to over 100 others is interested, looked at the demo and called me today to discuss, is interested in offering it to all his people, so that would be good - config is the same so should just be a matter of copying the script many times with a different "VSP" name on each!
BTW - if anyone else wants to use the same direct approach, don't make the same mistake I did - bcc: not to: them all! I wanted to encourage them to compete a bit by seeing competitors on the list. Most were OK with this, but a small number were very abusive indeed! Oh well, commercial vs "community" as one put it ...