Have you had success with hosts using "Comcast Business Class Voice" phone service?  I know you discourage against VoIP because of the call quality and the incompatibility with feature dialing, so I thought I'd ask.  Comcast says they're not really VoIP, that they use a dedicated cable line just to get to the telephone network and don't go over the public internet.  But you gotta wonder.  So has anyone used Comcast as a host and does it give adequate results?  I've always used a regular phone line for my webinars.