From a press release
Along with an online campaign, I-am-immune.com - the official community for I Am Legend - will give members exclusive access to information about the film, a chance to voice their own opinion, online & street challenges, free swag, daily updates, message boards, insane prizing and the opportunity to see the biggest Movie Stars of the year at the Largest Movie Premiere of the Century.
As a member of i-am-immune.com, your objective is to stay active to stay immune. Members will be tasked with weekly online challenges to help promote the site and film, along with 3 offline challenges, which will give members the opportunity to earn free swag and chance to win a VIP Trip for 2 to New York City for the world premiere of I Am Legend at Madison Square Garden (air fare and hotel stay are covered).
In terms of Street Challenge's, member's of i-am-immune.com will visit a section of the site - called Street Challenges - where they will be tasked with going to a specific location, on a specific day and time within their city (one of 14 markets) to pickup an exclusive swag item, which will contain a code that must be entered into the Street Challenges section of the site. Once the code is entered, they will be eligible to win prizes and gain access to the next Street Challenge.