Has anyone heard "Back Against the Wall"? It's a tribute album, which is the entire Wall album, sound effects and all. It was produced by Billy Sherwood and features tons of prog rock "superstars", like Rick Wakeman, Keith Emerson, Tony Levin, and Ian Anderson to name just a few. It also features Glenn Hughes, Tommy Shaw, Robby Krieger, and Dweezil Zappa among others. It's a pretty awesome tribute disc, I suggest checking it out if you are a fan of Pink Floyd or The Wall.