Photoshop. Yes, uber-noob at it, but, at least it's something. I don't use tutorials, mainly because I can never follow them, but if anyone could direct me in the way of some simple/good ones, I'd be grateful. CnC?
Interesting colors, but of course you can work more on it with obvious reasons to explain. I do have a few places for tutorials, by the way. Just hit me up if you want a link or two.
I like the broad scheme of it, though it seems a bit simple for you. As far as this goes, my only MAJOR complaint is that the purple on the middle is just killing me. Its too solid. Lighten up the opacity a bit. Mind if I see the stock?