Obviously iTunes and iOS updates alone won’t make iCloud sing: Apple’s building iCloud features straight into OS X, with a new 10.7.2 version of Lion rolling out today. In addition to new features like iCloud email, calendar, bookmarks, and Reading List sync, iCloud is taking over existing MobileMe features like Back to My Mac and Find My Mac.

The new version of iPhoto, 9.2, adds Photo Stream support for backing up your iPhone and iPad captures over iCloud, along with some usability tweaks. There’s also a new version of Safari, with some performance and stability enhancements.