task MailChimp Random Subscriber Selector

For the upcoming launch party of ATTIC, numerous businesses are donating door prizes to be given away in a raffle format. Several of the winners will be seleced dynamically from attendees that register for a MailChimp-based newsletter while attending the event. To make this possible, I'm developing a simple mobile web application that uses the MailChimp API to request the current subscriber list (in real time) and then randomly select one subscriber.