Lion will debut on Wednesday (US time) on the Mac App Store
The cat's out of the bag: During Apple's <a href="http://www.macworld.com/article/161212/2011/07/apple_third_quarter_earnings.html">third-quarter financial earnings call</a> on Tuesday, chief financial officer Peter Oppenheimer announced that Lion would debut Wednesday on the Mac App Store. The OS update will cost $31.99.