Irvine-based RealtyTrac, a provider of online information about foreclosure properties, said today that it has launched a new foreclosure resource center as part of Yahoo! Real Estate. RealtyTrac said that the new Yahoo! Real Estate Foreclosure Center will offer the ability to search for foreclosures, analysis of trends, and education about buying properties in foreclosure. RealtyTrac maintains a national database of foreclosure and b ank owned properties.