A quick note for all the apocalyptic adventure-seekers out there: The promised Darksiders demo is now available on Xbox Live Marketplace. As previously announced, this is no ordinary demo, either. No, this sucker contains the game's first dungeon in its entirety, a chunk of gameplay that should take approximately 90 minutes to complete for the "average player." It's not often that publishers give away that much game for free, so be sure to give it a go.
Oh, and don't forget to post your completion time here in the comments. We're curious to see how close to the mark THQ's estimate is.