Ai Weiwei, one of China's most controversial artists, looks on during the 'So Sorry' exhibition opening at 'Haus der Kunst' on October 11, 2009 in Munich. Miguel Villagran/Getty Images hide caption

itoggle caption Miguel Villagran/Getty Images

Game industry analysts say the number of hours spent playing video games is increasing by about 8 percent each year. iStockphoto.com hide caption

itoggle caption iStockphoto.com

InBflat.net features 20 YouTube videos of people playing instruments in the key of B flat. inbflat.net hide caption

itoggle caption inbflat.net

Companies offer services as varied as song streaming, concert ticket sales and music downloads using business models ranging from subscription to free-if-you-watch-an-ad. Courtesy of Pandora, Songkick, Rdio, Rhapsody, eMusic and Spotify hide caption

itoggle caption Courtesy of Pandora, Songkick, Rdio, Rhapsody, eMusic and Spotify

The Consumer Electronics Show this week is expected to feature more tablets to compete with the Apple iPad, left, and Samsung Galaxy Tab, right. Gero Breloer/AP hide caption

itoggle caption Gero Breloer/AP