Sync Framework 2.1 is now available.
Notable features include: SQL Azure Synchronization, and support for SQL Server Compact 3.5 SP2 (which includes new APIs for managing change tracking in code).
The Sync Framework Team has also published a code sample, which demonstrates a Sync from SQL Azure to SQL Server Compact.
If you are using Sync Framework, make sure to follow JuneT’s blog. The latest entry concerns Sync Framework Provisioning (creation of metadata to support Sync Framework) and the new Deprovisioning API in Sync Framework 2.1.
To help you prepare a database for Sync, a tool is now available on CodePlex: SyncPrep.