Well, I just got back from Memphis about an hour ago. I sort of echo the sentiments of everyone who has posted here.
Trent and co. gave it their all and it was probably one of the most energized performances I've seen in years, but shit, the crowd just sucked. There was no energy (at least on the left side front where I was. It seemed like the middle was better). NIN kept giving and giving and kept wanting the fans around me to reciprocate. I mean, it sure seemed like I was the only person having a good time. I have to say though I got really irritated with the number of things people threw on stage: glow sticks, a shirt, bottles of water... What a bizzare sign of affection.

Someone had the galls to belt out "I want you to fuck me like an animal" during SICNH. WTF?
The whole band looked amazing. I was screaming my head off when Saul came on and then I was embarassed because I was only person in the area who seemed to be excited about seeing the two of them on stage together. That part of the performance really blew me away the most.
Pictures came out like crap. I was too far left to get a good shot and the camera was dying (spent a lot of time in Graceland. Guilty Pleasure), so I couldn't zoom or use flash. Here are a couple half decent ones:
I only ran into two people I knew (Sorry Orestes, Greg and others. If we did cross paths I didn't recognize you. I hope no one feels snubbed. It wasn't intentional) One was Justin aka "super fan" in the Houston airport of all places and the other was Chris. Chris, I forgot your ETS username. Anyhow, that's us:
Performance wise I thought this was an amazing concert. I thank NIN and the rest of the bands for doing this and I wish I was able to go to New Orleans as well, but my husband and I were in Tennessee attending a friend's funeral. This is another reason why I wasn't too particularly social at Voodoo fest.
Sidenote: I saw Ville, Linde and Gas of H.I.M. across the street from my hotel Saturday afternoon. If anyone was staying at the Holiday Inn, those guys were there! God, Ville is just looking awful these days.