Casino operator Harrah's Entertainment swung to a first-quarter loss, citing costs associated with a deal to take it private and "challenging economic conditions." The world's largest gambling company by revenue said it had a net loss of US$187.8 million, compared with profit of $185.3 million in the same quarter a year earlier. Harrah's said first-quarter income fell to $401 million from $451.2 million in the first quarter of 2007.  The casino company reported a 2.1 percent decline in sales to $2.6 billion from $2.65 billion a year earlier. Full Story.