Just as Apple promised yesterday (and as we predicted,) OS X Mountain Lion is now available to all on the Mac App Store. If your Mac is supported, you can head over to the Mountain Lion download page and grab it for $19.99. Make sure you're on a speedy broadband connection though, as the download weighs in at a hefty 4.05 GB. Mountain Lion was announced just five months ago, and has going from Developer Preview to public release fairly quickly thanks to Apple's new annual OS release schedule.

Have you downloaded it? Are you going to wait until 10.8.1? Sound off in the comments!