szilard: nice list
DM: as has been touched on, your probably safe in assuming your players have monkey-like attention spans, and a hand-out for them should be focused. That doesn't preclude doing a longer work for yourself, and I would encourage it, in part for the simple reason that ideas not written down tend to go away, and when written down, organization counts for a lot when trying to access later.
Of course, you can try to bridge the gap between your players and you. Something longer that is well-organised, and as noted with lots of pics, might be read by them, at least for information relevant to their charecters.
In terms of organization, you might try the following:
-race & class (this may be short if going by the book, or may warrant two quite long sections if there is lots of specific info).
-regions (most of what is listed in the first post can go here)
-equipment and money (if needed)
-gods, planes, and religions (you can do these any way you want, but you have to think about them at least a little)
-historical overview (some of this can go in the above sections).
My main advice though is to try to have fun with it. Follow your own interest. Share it with other gamers if you think its decent.
And don't expect players to read much of it (if you share it with them). BUT, then again, they may read some of it, and do things with it you never expected. I have seen it happen.