I'm wondering if there's a twilio based replacement for google voice. It's got most of the building blocks.
However, I suspect it's the free aspect that everyone's bemoaning. :-)
My concern isn't really about the money, though the free calls through voice are nice. It's that Google voice has my number now (as a gizmo refugee), and that + a voip provider + cell provider could be condensed down to twilio on the desktop and wifi, and maybe cell data on a tablet, or prepaid cell as a backup.
The $1/month for a number isn't bad, international sms is awesome for my use case.