Tax Implications on Rental Income in the U.S.

[lilbuffet]

I am currently looking at purchasing a rental property in the U.S. Does anyone know the tax implications on the rental income. I know there is withholding tax of 10% if I were sell the property, and I read that the tax can be as high as 30% on your gross rental income.

Can anyone verify this, or does anyone currently own rental property down in the States?