Foursquare has partnered with 7-Eleven and the team behind Paramount Pictures' forthcoming film Super 8 to send users on a mission to space.
From now until June 30, Foursquare users ages 14 and up can check in to a U.S. 7-Eleven location for a chance to win tickets to Super 8 (every 88th checkin), a Zero-G experience, which enables participants to float and move about as if they were in space on a modified Boeing 727 (every 88,888th checkin), and even a trip to space via Space Adventures' Suborbital Spaceflight program if 888,888 checkins are made.
(Maybe you'll be the second person to check in to space.)
Entering is as simple as checking in at a 7-Eleven using Foursquare's apps for iPhone, Android, BlackBerry, Windows 7, Palm or Ovi, and clicking through the "Unlocked Special" to the registration form.