Can you really blame them?
Sure, it's dumb that they dropped Nintendo in the first place, but of course that's just my opinion as a Nintendo fan (more dumb if I actually shopped in such a place). With all the hype the Wii is getting, it'd be extremely dumb to keep that Nintendo boycott. If they dropped it in the first place because they didn't think Nintendo products sold well, it'd only be logical that they'd pick them back up if they thought they would sell.
Yup, there's actually a Wii bandwagon now. Better get on.
EDIT: When did "boycott" become a modable word?