What IS fma_exchange? A fic exchange community created to encourage fanfic writers to step outside boundaries and stretch their creative talents further. For instance, if one wrote purely Ed x Winry, it might be interesting to be assigned Alphonse Elric gen!fic (or even Ed/Greed/Ling/Winry, if you wanted to try something really new XD).
It was also created to help writers improve their craft, not only in terms of mechanics but also in characterization (of yes, even characters she/he did not normally think about).
Participating grants you the opportunity to not only broaden your horizons, but also to receive unbiased, detailed constructive criticism from a panel of judges. What are you waiting for? :D
For more information, please read the rules and guidelines (updated June 2008).