According to Canned Dogs, documentation has been leaked pointing out, that
Bones is planing a Second Season of Full Metal Alchemist as well as Darker than Black.
http://zepy.momotato.com/2008/07/04/bones/
Personally i was a little bit disappointed from the Ending of the Serie and the FMA Movie. Edward leaving Winry behind tztz
But i don`t see how they can recontinue the Serie. Maybe Elric Brother Action during the Second World War (or was it around the First World War) ?
Regarding Darker than Black: Yes ^^ I was hoping for a second Season for quite a while. I just hope they don`t mess it up.
I didn't watch Darker than Black, so I can't comment much on it.
As for Full Metal Alchemist, there could be a possibility that it may be a remake. After all, the anime differed from the manga after a certain point, not to mention the latter is still ongoing.
It's true, I think, partly because studio BONES doesn't mess around with the fans unlike the producers of Genshiken, what with all the deception with kujiki unbalance.
I would love to see a second season for both even though I think Darker Than Black has a better chance of a second season actually happening. Both were fantastic series to me... except for those stupid Elric brothers leaving Winry behind like she means nothing.
Sometimes, we can never tell if information on the internet is reliable or not. The news may be fake for now, but going by the reaction of anime fans from this particular saga, it may prompt Bones or any other animation studio to come up with new seasons of Darker than Black and Full Metal Alchemist.
BONES will not disappoint, there will be a second season of DTB, FMA really has nothing left to expand on.(except for the romance between Ed and Winry)