Looks like the Full Metal Alchemist anime is being redone and will begin airing in April of 2009. If you don't already know, the Anime that was done previously followed the manga up until around the time Greed made an appearance. As you know, when Anime follows a Manga and catches up in chapters, anime only fillers are introduced to allow more content within the manga to be developed. Knowing this, Hiromu Arakawa (Author) didn't want the anime to completely follow the Manga. So instead of waiting or creating fillers to pass the time, they decided to write a different ending for the anime. It is because of this that the manga and anime went two separate directions.
Currently the manga for FMA is still ongoing (Chapter 91 came out earlier this month) and from what I've heard, this version will be the retelling of the story which follow the manga from start to finish.
Anime News Network Article
Edited, Jan 11th 2009 3:48am by ImmortalAlchemist