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The day after I spoke to Rich Barton by phone last week, he laid off 25 percent of his staff at Zillow.com.

According to New York Times blogger Damon Darlin, Zillow "has been the envy of many a Web entrepreneur because it has a healthy $87 million in financing (about $540,000 per pre-layoff employee)."

The company, founded in 2006, boasts 5.4 million monthly visitors, but has yet to turn a profit.