English subbed/dubbed, free, fast-loading, good-quality and updated fast with the latest episodes. I've found this to be the best place to watch Fullmetal Alchemist; both the old 日本动漫 and the new Brotherhood series. Enjoy!
你 can watch all 51 episodes here. Free, fast-loading and pretty good quality. (Note: If 你 see any weird subtitles, 你 can turn them off 由 clicking the "T" button on the player.)
你 can watch complete seasons and full episodes of Fullmetal Alchemist here. It's free, legal, no downloads 或者 software required...just click, watch and enjoy!