It is understandable for the public to have been confused by the recent media stories about granite, but it is important to recognize that the facts do not support these claims. Often times the media and other organizations will take quotes from reliable sources like the EPA and only highlight the areas that create more interest or help promote alternate products with no regards to the factuality of the data. Recently, Elizabeth Whelan, president of the American Council of Science and Health wrote an article titled "unfounded health scares" which was posted in the Washington Times. The article mentions granite's relation to radon as one of the top 10 controversial unfounded health scares of 2008.
With regards to actual science, the most recent study on the safety of granite completed on November 21, 2008 can be read in its entirety on the Marble Institute of America's website.
I encourage you to visit their site for a truthful evaluation of over 115 of the industries most commonly used stones for bathroom and kitchen countertops.