A Release Candidate (RC0) of Sync Framework v1.0 and Sync Services for ADO.NET v2.0 for Desktops and Servers is now available. 
 
These components can be found as a top level feature within SQL Server 2008 RC0 which has also been made available for early download by MSDN and TechNet Plus subscribers. RC0 is the final step before SQL Server 2008 RTMs in Q3 of this year. After logging into their respective accounts, subscribers can view Product Keys and download SQL Server 2008 RC0 from the following links:

Download: SQL Server 2008 RC0 (MSDN subscribers) | SQL Server 2008 RC0 (TechNet Plus subscribers)