Depreciation Question

I am buying a property in the post Katrina area of Miss.

I have been told that the property is located in a zone which the govt. created known as the "Go Zone".

Supposedly, anyone who buys property in this zone will be allowed to depreciate 50% of the property in the first year as an incentive to buy in the area.

I have never quite understood the world of tax deductions.

Can anyone explain to me what this 50% depreciation will do for my tax situation next year?

Thanks