LEADING THE DAY: Sony faces a lawsuit and the questions of lawmakers following news of data breach that may have released the personal and billing information of up to 77 million people.

Reps. Ed Markey (D-Mass.) and Mary Bono Mack (R-Calif.) have called for Sony to further explain the breach and the effect it might have on customers. Markey said he is particularly concerned about the risk of identity theft caused by the breach. According to The Hill, the breach has prompted Mack to announce she will introduce a data protection bill.

Bloomberg reported that an Alabama man is the lead plaintiff in a class-action lawsuit against Sony, seeking refunds and reimbursements for any losses related to credit card data stolen from the site.

Apple may have bought iCloud.com: GigaOm reported that Apple may have bought the domain name “iCloud.com” from Xcerion, a cloud-computing company. The report says Apple paid about $4.5 million for the domain name, citing a source familiar with Xcerion.

Apple is widely believed to be launching a cloud-based music service soon, and the rumored purchase has some speculating that it will be called iCloud, though the company could be interested in owning the domain name for other reasons.

eBay earnings: Online retailer eBay announced its profits rose 20 percent in the first quarter of 2011. The Associated Press reported that revenue for the site had climbed 12 percent to $1.55 billion. In the second half ot 2010, eBay reported single-digit growth.

Revenue from the company’s PayPal service rose 28 percent over the same period last year. PayPal has 97.7 million registered users.

Visa invests in Square: Visa has invested in Square, the mobile payment service run by Twitter co-founder and newly appointed product manager Jack Dorsey. The investment marks Square as an important company in the growing mobile payments field. The New York Times reported that a Visa executive will join Square’s board. The company did not specify how much money it invested in Square.

White iPhone goes on sale:After a 10-month delay, Apple’s iPhone now comes in white. The company began selling the lighter handsets online and in stores Thursday, after officially promising a spring release in February.