I have posted the game world background to the official website:
http://lemuria.org/SM3/welcome/worldNow you can start to think about your characters. :-)
I don't think I will be able to finish the game engine before I go on holidays on saturday, so let's consider something like September 1st for the official launch, but you can now begin to come up with character concepts and maybe post them here so I can give you feedback.
Also, as always, if there is something unclear - ask. One thing in advance: There is more background than this, but it has only been posted to the GMs because you as players should discover it IC.