The purpose of this study is to look at blood and tissue samples for changes following the use of Sunitinib malate. Additionally, we would like to find out if the drug, Sunitinib malate, is safe and works in men with prostate cancer. Sunitinib malate , also known as Sutent, is approved by the U.S. Food and Drug Administration (FDA), for treatment of tumors of intestines and kidney but it is being tested in research studies for use in men with prostate cancer.