Hereby the official announcement of Microsoft:

The System Center Configuration Manager team would like to announce that the following has been released and available for download:

Configuration Manager 2007 Service Pack 2 Beta
This is the official Beta build for Configuration Manager 2007 SP2.

New features:

- Refer to the SP2 Overview article posted on the primary Configuration Manager MSConnect site for all the new features and new supported configurations
- Hotfixes included in SP2 article can be found on the primary Configuration Manager MSConnect page.
- Deployment guides for BranchCache and the new AMT features are available in the download section. .
- The new OpsMgr07 R2 ConfigMgr07 Management Pack can also be downloaded, this supports 64bit OpsMgr client agents.

Please review the Release Notes before performing any installation and upgrade.

Join the open beta program through Microsoft Connect to download the software and to provide your feedback to the product team.

Enjoy!