Ubisoft announced today that the Rock Hits 1970s DLC pack for their guitar rhythm game/learning tool, Rocksmith, is now available on Xbox LIVE and PlayStation Network. The pack brings three songs for individual purchase to Xbox LIVE, "More than a Feeling" by Boston, "Jessica" by The Allman Brothers Band, and "Smoke on the Water" by Deep Purple. PS3-touting Rocksmith fans can currently snag the first two songs, while "Smoke on the Water" will be available soon on PSN...