Based on a nice discussion with folks om Twitter (@kencamp, @SherylBreuker, @Bernals & @seanwilder) I confronted the question about Hosted PBX vs Google Voice (nee Grand Central) vs on premise PBX.

I have on several occasions said that Google Voice, in it current incarnation, is not very innovative. The functionality of Google Voice is found in both PBXes, but also service providers are having those features.

However, Google Voice is a very good start on letting users control their own telephony - even if it lack a feature or two.

The question that is valid just before Google Voice goes from closed beta to public release is how will the Hosted PBX and the on premise PBX measure up?

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