This morning, Google officially unveiled its Voice/Gmail integration , which will allow users to make Google Voice calls from the browser. It's a pretty nifty service that is gaining traction in the TechCrunch SF newsroom. Another product we're eyeing? That shiny London-esque phone booth with the "vintage" 1957 phone that makes free domestic and long distance Google voice calls. I dropped by Google's SF office to get a full tour from Jason Toff, the product marketing manager for Google Voice who spearheaded the phone booth project. (See video tour ahead). According to Toff, Google has already manufactured five phone booths and is zeroing in on several high-trafficked venues. No contracts have been finalized yet but he expects Arizona State University will be one of the first (with its student body of 54,000 strong). Free Goog-wear alert: Google has also given us 7 Voice T-shirts for readers who have always wanted to look like a living, breathing Google icon. We have several tees in size M and L.