I heard about it for the first time today. My son surfs around on you-tube, and he mentioned it to me when I got home from work.
AFter supper, I plonked down here to digest, and after a few posts, decided to check out the anime thread, and hey, two hits in one day. I think I'll check it out. If you say it's like fma, then I'll probably like it, although I don't like religious overtones in any cartoon, I admire it because cartoons don't often deal with such subjects. (Bleach, for one is awesome, and its religious/cultural/etc blend pretty interesting rather than overpowering)