FROM Microsoft's Connect Site (http://connect.micorsoft.com)

Do you have passion for technology? Do you want to make a difference? Then try out SQL Server 2008 Release Candidate 0 (RC0) and provide your feedback. The SQL Server development team uses your comments to help refine and enhance product features.
Download Release Candidate 0 from the Download Center! New! The SQL Server team presents the future of SQL Server! SQL Server 2008 represents a significant leap in features, functionality, and improvements. Get your hands on RC0 at the Download Center and then come back here to learn about all the features.
What's New in SQL Server 2008? New!
RC0 is now available. Discover all the extra features and the latest improvements.
SQL Server Product Site
Visit the SQL Server 2008 Product site for product information, marketing whitepapers, webcasts, and videos.
Download the RC0 Feature Pack from the Download Center! New!
SQL Server Connect FeedbackWe want to hear from you! Tell us about any bugs you find or difficulties you encounter, and what you want to see in SQL Server 2008 for this and future releases. We appreciate your feedback!
MSDN SQL Server ForumsHave questions? Run into an issue and you could use some feedback? Discuss SQL Server 2008 with our developers, MVPs, and the entire SQL Server community.
CodePlex Community SamplesWant to see different samples and uses of SQL Server code? Visit CodePlex and look at real world examples.
I started the download process on this and the BOL.
I always like to see the Feature Pack included. This time it has the normal components that can be seperated from the general install to be used with developers and clients. But its the other items that are the greatest value.
- Microsoft SQL Server 2008 Analysis Services 10.0 OLE DB Provider
- Microsoft SQL Server 2008 Command Line Utilities
- Microsoft SQL Server Backward Compatibility Components
- SQL Server Compact 3.5 SP1
- Microsoft SQL Server 2008 Data Mining Add-ins for Microsoft Office 2007 (Wait till you see these!!!)
- Microsoft Core XML Services (MSXML) 6.0
- Microsoft SQL Server 2008 Management Objects
- Microsoft OLEDB Provider for DB2
- Microsoft SQL Server 2008 Native Client
- Microsoft SQL Server 2008 Policies (Best practice examples of taking advantage of the new Policy Based Management)
- Microsoft SQL Server 2008 Report Builder 2.0
- Microsoft SQL Server 2008 Report Services Add-in for Microsoft SharePoint Technologies
- Microsoft SQL Server System CLR Types (Allows Client Applications to use these new types (geometry, geography, and hierarchy) outside of the server.
And Finally available for download for the first time (previously only on installation media)....
- Microsoft SQL Server 2008 Upgrade Advisor
P.S. Do not forget the SQL Server 2008 Upgrade Assistant from SE in work with Microsoft.