Johnson was behind many of Neil's visual projects including the Rust Never Sleeps film, which is enough right there to make him a God in my eyes. More on Johnson here.
On a lighter side, Will Ferrell dressed up as Ronnie Van Zant led a cast of rockers including Billy Gibbons, Beck and Ben Harper through a rousing almost 10-minute Freebird to take the show out. If you were under a rock and missed both, you can find them here. Neil is at about 27 minutes and Will Ferrell is about 10 minutes from the end: