Update: Bethesda has touched on at least a couple of features coming, namely the editor and 64-bit .exe.
As noted in our PC review of RAGE earlier today, the game is not up to snuff in a few departments, namely: graphics options, weapons menus, textures, and performance. On the whole, the game is in decent enough shape for many, but there's definitely work to be done.
Tweets today by id Software president Todd Hollenshead indicate at least one of these matters should be resolved by tomorrow.
"PC players: Look for new ATI drivers tonite. We [are] working hard with those guys and continue to monitor forum reports."
"Update on new ATI drivers - close now, but likely tomorrow before they are tested and ready for release. PC feature requests: stay tuned."
In the meantime, we recommend visiting our PC tweak guide in the forums.