There's a Q&A with Matt Hooper on Next Generation (thanks Computer and Video Games) talking about Rage, Tech5, and other areas of interest about id Software. One point seems particularly interesting given one of the cornerstones of id's past successes has been support of user-generated content. While acknowledging this has an appeal, Matt indicates that support for such content is not a high priority for them in Rage:

What are your thoughts on user-created content?
As a game player, I love it. But that doesn’t mean at the same time I can’t love a BioShock or a Call of Duty 4. You can have a focused game, and do that really well. I think that’s the important thing – doing something really well. What the other games mentioned do as far as user created content, and just on that side of things, it’s like a different focus. I think there can be a separation, almost like movie genres. It’s okay to make a comedy, or a really hardcore, serious documentary. I think there are different fits.

For us personally, our biggest goal is – you can see it right now – we’re pushing on the fidelity, visually. We’re also pushing on the gameplay fidelity. Those two things are huge. For us, we’re doing things that we’ve never done before. That’s already a lot of eggs in the basket. As far as user-generated content, it’s not a huge consideration for us right now.

id games have always had mods, but what Spore and LittleBigPlanet have done is make it automatic, and networked. You can get other people’s creatures, without doing anything at all. Have you ever thought about automatically connected maps and a user ranking system for maps in Rage?
Yeah, we thought about all of that, but I can’t say we’ve specifically implemented it right now. Again, we’re concentrating more on just making a great game with this new tech. But those conversations happen all the time.