HERE to redeem today- quantities may be limited, so go now! Once you redeem, you'll be given a unique promotion code which can be used at Fandango.com to purchase a ticket and get one free. Free ticket will expire June 16, 2010. If you don't want to redeem your coupon code now, it will be saved in your Tropicana account and will also be emailed to you!
If you haven't joined Tropicana Rewards yet, become a fan on Facebook and they will give you some free codes for points- you'll have to enter them within 6 hours though, so go HERE to become a fan and then HERE to register with Tropicana.