what's the longest you've waited in line for something?

WIth all the hype surrounding the so-far poorly operating iPhone, I'm curious, what's the longest you've waited in line for something? I once stayed up all night for Doobie Brothers tickets, and I can admit this now, the wait in line turned out to be more entertaining than the damn concert (the Doobies having sold thier soul to Michael mcDonald shortly before the tour).