Google on Tuesday announced that calls placed within the United States and Canada using Google Voice will continue to be free through the end of 2012. “This is our way of helping you connect with friends and family across the country,” Group Product Manager Vincent Paquet wrote on a company blog. Google stated last year that calls made within the U.S. and Canada would be free through 2011, but the company is extending the promotion through 2012 for reasons unknown. Google Voice was born from Google’s acquisition of GrandCentral in 2007, and the later acquisition of Gizmo5 in 2009 is expected to eventually add VoIP capabilities to the service. For the time being, VoIP calling is only supported from within Gmail.