As fans, I think we tend to get too far in either direction; after the loss to Tampa people were screaming for coach firings and wailing about a lost season. This week it seems most people are overly confident; most think we'll walk all over Arizona and many are itching to go into the Metrodome and play the Vikes again. I think if the Packers lost in either scenario the fan freak-out would be utterly deafening. Hell, short of a SB win, a large portion of the fans will freak out and start calling for coach firings, again.
Personally, I think a loss to the Cards would be the biggest bummer (followed very closely by a third loss to the Vikes) - I'd just like to see them progress to the second level, at least. In the end, though, I'm proud of this team - they sucked it up and played hard, and in the process vastly surpassed most expectations, especially those based on the Tampa loss.