I'm about to talk to my local dealer about putting in an order for a 2013 Volt (their 2012's are all sold). I liked the 2012 tan leather option on the 2012's. I decided to download the 2013 order guide to my blackberry PlayBook and noticed that the urban cloth and urban leather option has been renamed pebble beige cloth and pebble beige leather.
Link to GM order guide just click 2013 and under ordering information click cars an light trucks. Then click Chevy cars. Then click print book, select Volt, select print model and hit print. It will give you a PDF of the order guide.