Aside from unleashing the new iPad to the masses today, Apple also just released a new OS X 10.8 Mountain Lion Developer Preview. Dubbed Mountain Lion Developer Preview 2, build 12A154q is the second beta release of the company's next major desktop operating system. Developers can grab a download redemption code in the Apple Developer portal, which will be used to grab the update from the Mac App Store. OS X 10.8 Mountain Lion will be publicly released this summer.