Very nice
I ended up listening to this song by accident, but i am glad i did.
I've put it on my pod and showed the intro to my friends and they all like it. I'm not sure what instrument/sound effect it is, maybe a jet engine is what i thought first time.
Anyway it's all very nice, the only improvement i could think of is maybe a little heavier on the drums. But this is probably the best song you have done anyway.
Anyway thank you very much for the song
(Id love to get a response on what sound effect the intro sound is ^^)