First saw on MacRumors that Apple has seeded the OS/X Mountain Lion GM to Developers. The GM is the ‘Gold Master’, and while this doesn’t mean that a release to end users is coming any second now, it does mean that the release is very close, I’d say within “weeks”, but to make the ship date of “July” there are only 3 left in the month anyway.
Apple released the Golden Master (GM) version of OS X Mountain Lion to developers today. The “golden master” designation indicates that this version of the software is intended to be the final version released to the public, barring any last-minute issues. The Build is 12A269.
No idea if this hints at a release date previous to the 19th, but we (the ones who will download and install this the second it’s released) can hope.