Nintendo is doing something called National StreetPass Weekend for December 14-15 in the United States and Canada. During the weekend, Nintendo will allow all Nintendo Zone locations dispersed around the country to communicate to one another, thus allowing 3DS users to gather StreetPass data from people from all over the country.
This is a good chance for 3DS players to fill out that StreetPass map and gather some puzzles pieces and more in the StreetPass games. For a map locator of all 29,000 Nintendo Zone locations, you can check out Nintendo’s page here and you can also check out a video for the event below.