We’d previously mentioned that the Gizmo VOIP calling service was integrating Google Voice numbers and allowing for free outbound calls. Gizmo has since launched a Gizmo Voice site to help set up Giz/Google mashup systems, but made a notable change—the first three minutes of any outbound call are free, but after that is generally $.02 per minute in the U.S. Still, those already through Google Voice's invite process can use their Voice home pages to connect a call, so it's incoming to a Gizmo account, for free. Thanks to many commenters and emailer Kevin for the tip.