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After upstart hacker collective Lulz Security breached Sony Pictures user data last week and released the source code for the Sony Computer Entertainment Development Network on Monday, Sony has finally alerted its users to the data breach. A PC Magazine post today has a statement from the company warning 37,500 users that their "name, address, email address, telephone number, gender, date of birth, and [Sony] website password and user name" had been obtained and revealed.

Meanwhile, LulzSec continues its campaign of mischief with an overnight attack on a security contracting firm whose Web site has been altered all morning.

After trading barbs with security consultant Joe Black on Twitter yesterday, the hackers went after his site overnight, superimposing a picture of their mascot, Mr. Lulz, on the home page. The hack responds to a challenge on Black & Berg's site. He does seem to be asking for it:

Oddly, Black doesn't seem to be too furious about the hack. He tweeted this impressed-sounding missive today: "@lulzsec We're not sure what happened, we're looking into it. It seems whoever is responsible was very good at covering their tracks.#ninja" He also requested the group "please unfuck our website."