Two things; firstly, despite the reputation that Channel 5 used to have for being a bit naff, they've put a lot of work into this trailer - the song is absolutely cracktastic.
Secondly, when I first heard it - and before I realised that it was clearly a specially written song, I thought it (or at least the first half) would make a wonderful basis for an SPN fanvid.
I still do. "Their indestructible hair"? *g*
If anyone with more time than me wants to put something together, I'd be a happy bunny!