Apple has released OS X Lion today, the latest version of its operating system. Some of the new features are:
- support for multi-touch gestures
- support for allowing any app to be a full-screen app
- a new mission control
- mac app store support
- new launchpad
- resume feature for all apps
- autosave / versions (this one is pretty kewl, you no longer have to save anything)
- airdrop for instant file sharing with other macs
- new mac mail with added functionality

more info is at http://www.apple.com/macosx/whats-new/

And here's the best news, the upgrade is only $29.99