Check your favorite music directory to see how many artists besides the Allman Brothers, George Thorogood or the Grateful Dead covered slide-guitar pioneer Elmore James' "Done Somebody Wrong" (RealAudio excerpt), "Madison Blues" or "It Hurts Me Too," respectively. They're all here too, along with "Shake Your Moneymaker," "The Sky Is Crying," "I Can't Hold Out" and nine more.