I'd seen those before on the site.
It'd be cool if they added levels within cities and whatnot. The Citadel was cool, but it was a bit too... simple for my taste.
Imagine a really crowded plaza or something. That'd be cool.
All in all, Mass Effect was a BEAUTIFUL game. I have nothing but high expectations for the second one. Too bad it's going to be a year's wait before we get to see it