My favorite thing about this film is that there actually was a Governor "Pappy" O'Daniel (of Texas), who made his name with a radio show promoting his flour business. (Sadly, his first name wasn't "Menelaus", but one can't have everything.)
Plant once said that he preferred Dread Zeppelin's version of Your Time Is Gonna Come to the original, and I have to agree with him. DZ's version of Kashmir was also pretty good -- I think that was the one that involved an alien kidnapping the singer halfway through.
I hadn't heard Gilbert's take on the song before, but I like it.