iTunes 10.4 is available for download via Software Update on the Mac or directly from Apple’s site, offering specific compatibility with Lion. Additionally, iTunes is now a 64-bit Cocoa application for improved performance on compatible machines. Keynote, Pages, and Numbers also get Lion-specific features to utilize the new full screen, Resume, Auto Save, and Versions features in the latest version of Mac OS X.
Keynote – Whats New

This update adds support for Mac OS X Lion and takes advantage of the following features:
• Full Screen
• Resume
• Auto Save
• Versions
This update also adds new builds:
• Anvil
• Fall Apart
Pages – Whats New

This update adds support for Mac OS X Lion and takes advantage of the following features:
• Full Screen
• Resume
• Auto Save
• Versions
Numbers – Whats New

This update adds support for Mac OS X Lion and takes advantage of the following features:
• Full Screen
• Resume
• Auto Save
• Versions