Onvoy, Inc. offers VoIP services via Asterisk servers and BroadSoft.
I know this because my team is responsible for keeping them running; I
work there. ;-)  I know nothing about how much the services cost, but
can tell you they're quite reliable. ;-)  Might be worth a call.

Chad

-- 
Chad Walstrom <chewie at wookimus.net>           http://www.wookimus.net/
           assert(expired(knowledge)); /* core dump */