The colour scheme & lineart looks awesome (ROFL@the expression of the green-haired girl), however the rocks in the background are really lacking - they look too compressed/with artifacts (on the right at least). Make them bit less sketchy and it'll be perfect! :)

Wow, nice vectoring job, it's so nice and smooth. the two of them are very striking, they really jump right out of the screen at me. the bg is nice and bright, with the boulders(?) adding just the right amount of contrast. some birds would've been nice in the bg but overall i really like the work you did. very nice! :)

Oh wow, another l33t wall of the FMA game XD
I actually liked this one a lot more than the other one I've seen somewhere else, since the latter has darker mood and tad plainer bg.
A bit of an oddity for me though, the back-lighting seems to give off a 'glow' effect to the landscape in the bg, so I think the character should also be softened a bit, to fit the mood better... but, well, that's just me nitpicking. :P
THe rest of the elements and composition is top-notch.