Sony isn't the only one in hot water with U.S. antitrust regulators. Both Toshiba and Hitachi have also fallen under the watchful eye of the U.S. Department of Justice and will have their optical device divisions investigated, The Inquirer reports.

Once again, not a whole lot of details are yet known, but just like with Sony, it's believed that the DoJ is sniffing out something afoul with each optical makers' Blu-ray line. More specifically, it's likely each company is being probed for potential price fixing allegations.

Before being knocked out of contention, HD-DVD players could be snagged for as low as $99, which coincided with a promotion to receive a small handful of free HD-DVD movies through the mail. For the most part, Blu-ray pricing has yet to come down to the same level. It should also be noted that Sony, Hitachi, and Toshiba account for about 60 percent of the optical drive market, according to some statistics.