According to the reporting on MacRumors.com here of today’s financial conference call by Apple, the new version of Mac OS X 10.7 Lion will be released on Wednesday, July 20. It will be available as a digital download through Apple’s App Store, which is built into the latest version of 10.6 Snow Leopard. The new OS will download and install from an already installed version of Snow Leopard. According to the instructions on OSXDaily.com here, you can create a clean install bootable DVD after purchasing and downloading Lion through the App Store. Good luck with your upgrades!