From the announcement:
A few months ago we announced a contest for fans to design their own mission for Shadowrun: Crossfire. We received some intriguing submissions, and the time has come for fans to vote both on the Fan Favorite mission and on the Wildest Ride! Votes can be submitted at a forum thread posted for that purpose, or they can be e-mailed to firstname.lastname@example.org. So get voting, and good luck to all the designers!