Only available in stores. Page 12-13 in the ad to view. Says USB 3.0 support (can't confirm).
http://walmart.richfx.com.edgesuite.net/presentation/media/LA_January022011/?rfx_versioningid=31&rfx_versions=31&drpStoreID=4531&drpStoreID=4531&ec_url=http%3A%2F%2Fwww.walmart.com%2Fecircular%2Fca_ecircularfinder_results.do%3Fsfsearch_zip%3D60446%26x%3D25%26y%3D14
http://walmart.richfx.com.edgesuite.net/presentation/media/LA_January022011/?rfx_versioningid=31&rfx_versions=31&drpStoreID=4531&drpStoreID=4531&ec_url=http%3A%2F%2Fwww.walmart.com%2Fecircular%2Fca_ecircularfinder_results.do%3Fsfsearch_zip%3D60446%26x%3D25%26y%3D14