There's actually enough blame to go around. Hypocrites not buying the game, Capcom's horrible name and lack of advertising, retailers not stocking the title, internet hype setting unreachably high goals...Zack & Wiki is a good game surrounded by tragedy.
I just hope that the rumors of a sequel are true, that the game didn't cost too much to make, that it starts to exhibit Phoenix Wright level cult status and longevity, and that Capcom had realistic expectations for the title's performance.
... this just makes me wish that Nintendo had some focused and concerted effort to increase awareness of key new-style third-party titles that deserve to be given a chance with consumers. I can't help but think that games like Zack & Wiki, Trauma Center: New Blood, and Geometry Wars could ALL have benefited from increased point-of-sale visibility, advertising, awareness, demos, and whatnot.
They don't need to be commercials. They don't need to be fancy. They just need to let casual walk-in blue ocean consumers know that games like these exist.