Free voucher for 30% off Kindle accessories, $30 max, must be used by July 10th, 2012. Can only be used for items sold by Amazon.
At the left in the second row at the top, select your state/area in the drop-down, or enter your zipcode. If the Kindle accessories offer isn't the one listed for your state/area/zip, scroll through at the bottom where it says "More Deals."
If your state/area isn't listed, entering your zipcode should get you to "Nationial" offers.