Looks like a permanent price reduction.
http://www.amazon.com/Darksiders-Playstation-3/dp/B001D7T2VC/ref=sr_1_1?ie=UTF8&qid=1288369840&sr=8-1
http://www.amazon.com/Darksiders-Xbox-360/dp/B001D7T2VM/ref=sr_1_2?ie=UTF8&qid=1288369840&sr=8-2
Sorry if this is a repost, searched but didn't...