Once the bank takes a property back in a foreclosure sale, in all but a very few cases with local lenders, you'll need to wait until it is listed for sale. All of the major banks will not deal directly with buyers and will refer all inquiries to their local real estate agent. Try search by address using http://www.firstweber.com,
which is the website of my broker, or http://www.wisconsinhomes.com,
which is the consumer website for the Realtor's association. The information on these sites is current and accurate. You will find information on homes on other websites, such as Trulia, which may be somewhere in the foreclosure process, but not necessarily for sale.