Yeah, the Hollywood Forever cemetery is a really amazing place to see a concert. I go to the movie screenings there too. Fun stuff... you camp out, have a picnic, bring a bottle of wine, it's a pretty unique experience. I saw The Flaming Lips there, and it was fun.
Still, Sigur Ros owned it in a way, and I can't imagine someone topping what they did.
Here's a pic from part of the amp setup on the entryway...