To answer my own question (From TiPb blog):
The 10.7.2 update is recommended for all OS X Lion users and includes general operating system fixes that improve the stability, compatibility, and security of your Mac. It also includes support for iCloud, a breakthrough set of free cloud services that automatically and wirelessly store your content on iCloud and push it to all of your devices. iCloud on OS X Lion includes the following features:
- iCloud stores your email, calendars, contacts, Safari bookmarks, and Safari Reading List and automatically pushes them to all your devices.
- Back to My Mac provides remote access to your Mac from another Mac anywhere on the Internet.
- Find My Mac helps find a missing Mac by locating it on a map and allows you to remotely lock the Mac or wipe all its data.
- The 10.7.2 update also includes Safari 5.1.1 as well as fixes that:
- Allow reordering of desktop spaces and full screen apps in Mission Control.
- Enable dragging files between desktop spaces and full screen apps.
- Address an issue that causes the menu bar to not appear in full screen apps.
- Improve the compatibility of Google contact syncing in Address Book.
- Address an issue that causes Keynote to become temporarily unresponsive.
- Improve VoiceOver compatibility with Launchpad.
- Address an issue that causes a delay in accessing the network after waking from sleep.
- Enable booting in to Lion Recovery from a locally attached Time Machine backup drive.
- Resolve an issue that causes screen zoom to stop working.
- Improve Active Directory integration.
Getting started with iCloud is easy. After installing the update, OS X will automatically present an iCloud setup panel. Simply enter an existing Apple ID or create a new one and then follow the on screen instructions. To learn more about iCloud visit Apple - iCloud - Your content. On all your devices..