AwSmash, that's awesome. Probably your best work that I've seen.
Jamjam22, that's solid. Only complaint I've is the blending of the textures. Go about it again. I think if you follow TC's steps carefully and use the 'Gradient Map' for the layers that you're required to set them as 'multiply/darken' and 'screen' respectively, you'll get a better result. Other than that, it's fine.
This tutorial looks to be a kind of stepping stone for us all. Hopefully we'll get more of these.
Shadow_Boy1181, type 'dust or noise textures' in Google. You'll see numerous sites that have them. Or just set your search to 'images'. You'll get a lot of them.
I think I made a better one before the forums were changed. I don't remember if I posted it though. I love that CM Punk one though.
Your's is awesome. I think it'd be great with a different background. It looks awesome. This one signature tutorial has made everyone amazingly better. Hopefully all artists on the forum have a look at this tutorial.