Boise Idaho is not Palookaville! The day the Google car went through downtown happened to be the day (July 30th 2007) that Matt Damon was in Boise for a charity pre-screening of the Bourne Ultimatum. Here is a link to the local paper article;
Great hunt to try to find Matt on the sidewalk!
Looks like he is in here somewhere (below). If you click on NE in the image above you see this crowd (below) and some security guards.
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(thanks to Dan P.)