The two instance of my same number have been working great.
(I had a network issue with my ethernet cable bypassing router to a switch.)

Anyway, the point is, it is working great. And, I recently noticed a DSLR thread about VT with this topic: http://www.viatalk.com/two_phone_lines.htm That nicely says what I've been saying all along.

I do not believe that VT is really your competition.
So what they do is probably just a passing interest.
I expect your real competition to be Packet8 and Vonage.