Dwight Yoakum: Under The Covers. Includes Roy Orbison's "Claudette", Train In Vain (Yes The Clash), Tired Of Waiting For You, Here Comes The Night, Wichita Lineman, The Last Time, Things We Said Today, North To Alaska. Pretty entertaining album.
Also like the "Pickin' On" series of albums. You know, the bluegrass covers of classic rock tunes. Pickin' On "The Allman Brothers" and Pickin' On "ZZ Top", that sort of thing.
Paul McCartney- The Russia Album
Steve Howe: Portraits Of Bob Dylan
Okay not exactly rock, but... the Bob Wills tribute albums put out by Asleep At The Wheel are really a lot of fun.