Architects and SketchUpBook Reviewspacktsketchup 7.1 for architectural visualization SketchUp 7.1 for Architectural Visualization: Retweet and Win a Free Copy *Update*Thanks to everyone who retweeted and entered the competition, we are pleased to announce the 3 winners:elliothartleymschartley &urbanorienteerIf the winners could email us their address we will ship…Andy6 January 2011