Comment on Gizmo5

@pope52 , lucky for you, you're wrong! Gizmo5 is the only service that is officially supported by Google Voice. That said, Gizmo5 is a SIP service… You can use any SIP software with Gizmo5. I personally hate the official Gizmo5 client for the reasons you mentioned… I've been using Telephone with Google Voice and a Gizmo5 account, and I couldn't be happier… Very clean, low-profile app… But any other SIP client will work too! (use for domain, and your full 11-digit Gizmo number for your username!)