to many songs with good intro's...
but alright, some of the best intro's I know:
Not evrybody's favorite I think, but:
Chinese Democracy - Guns N' Roses
the talking chinese people for about 2 minutes and then the guitar and drums,
evry time I listen to that it gives me goose bumps because it was so awsome at the concert!

Hyper Music - Muse
most of the people think it's trash the intro,
well it is, but still in a way I think it's special^^
Time is running out - Muse
just the "human" percussion at the intro when the bass is playing is well done^^
Dead Horse - Guns N' Roses
the calm guitar and singing of Axl Rose, followed by 2 people who are talking and one says:
"When se said she was gonna like wreck my car, I dind't know what to do!"
Dance until we die - Omnia
don't have a youtube link for this one (will be posted when I am back home) but that intro is hillarious xD
because the singer says things like: Alright, I'm not gonna shout and then you here him shouting: "AAAaaaaaaaaahh for fuck sake" xD