There's another trailer online for the Tenacious D in "The Pick of Destiny", and it's in multiple quality Quicktimes. Unfortunately it's the voiceover one that was online the other day, but this is in good quality.

I'm still searching for the one I saw in the cinema before Saw III (review) which was superb...if anyone finds it tell me immediately!

In the meantime, have a look at the latest trailer over at Apple Trailers [QT:S:M:L:480p:720p:1080p:iPod].