Well, don't envy us too much. Apparently we were only given small window of time in which to purchase Napoleon Dynamite, because it's gone now.
Seriously, I just checked the store to find that it's back to being a rental only.
I'm sure it will be available for purchase sometime in the near future (as will be the case with most movies), but man am I glad I took advantage of that sucker when I did. I still can't believe it.
EDIT:
It can be bought now. Apple must have been screwing around with the store.