Data entered by contestants is not shared with any third party and will be destroyed after the contest has run it's course, aside from those belonging to the winners which will be kept for contact purposes.
ChannelFlip uses Google Analytics to analyse the site's performance. Details on privacy issues related to this are available at http://www.google.com/intl/en_uk/analytics/privacyoverview.html
Tracking "pings" are sent from the user's browser to a third party tracking service, on behalf of the sponsor, for the purpose of establishing campaign popularity. These contain no identifiable information beyond IP address and user agent string.