Seattle-based Zillow.com is reporting today that it has tied into Yahoo's popular Real Estate site, to provide its home valuation services. Zillow said that its home valuation service is available today on Yahoo's Search and Real Estate properties. Terms of the deal were not disclosed, but the deal marks a major win for Zillow, which launched its beta services in February. Zillow is backed by Benchmark and Technology Crossover Ventures. Zillow's services provide a satellite-driven, home valuation and price comparison tool used by consumers to estimate their home values.