Every person who has legal title on January 1, 2009 to a residential Florida property, lives there permanently, and is a permanent Florida resident, qualifies for a $50,000 exemption.
Many/most people who purchased here automatically got an application for the Homestead Exemption in the mail. If you did, and you filed for the application you should have a receipt. And each year after you file you should get a new receipt in the mail in January.
If you already filed, great. If not, don't wait. File now.
The deadline for filing is March 3, 2009.
Details and application forms here. Or file electronically here.