For what it's worth I have yet to even fire my DLC'd copy up but the game looks great. I'm thinking it must say something that I downloaded a game that I knew I wouldn't have time to actually play and probably won't until just before DR2 drops at the end of the month.
Take a victory lap Capcom, the rest of you might as well jump for the pressy-
Capcom is happy to announce that its recently released downloadable title, Dead Rising 2: CASE ZERO, has broken all records on Xbox LIVE with the best week  one unit sales in the history of all content distributed through Xbox  LIVE Arcade. The prologue to the highly-anticipated Dead Rising 2, Dead Rising 2: CASE ZERO, launched  last week as a unique piece of downloadable content exclusively for  Xbox LIVE Arcade. A standalone title that helps bridge the gap between  the original Dead Rising and the soon-to-be-released Dead Rising 2, it allows fans a taste of the new Dead Rising world on Xbox 360. 
The unique prologue experience gives gamers a glimpse of what’s to come in Dead Rising 2  as it includes new combo weapons; your first look at survivors and a  psycho; an introduction to new protagonist, Chuck Greene and his  daughter Katey and a system that allows you to carry your character  attributes collected in Dead Rising 2: CASE ZERO into the main game. 
Dead Rising 2: CASE ZERO is now available exclusively to download on Xbox LIVE Arcade. Dead Rising 2  will launch on the Xbox 360, PlayStation 3 and PC on September 28,  2010. For the latest assets and information, check out the Capcom press  center at www.press.capcom.com  For more information and to check out the latest recap of editorial reviews on Dead Rising 2: CASE ZERO, see the full story at Capcom Unity at www.capcom-unity.com