This is a round-up of some recent blog entries from Microsoft relating to Sync and Replication.
The Microsoft SQL Server Replication Support Team has started a blog which includes excellent Merge Replication advice. Start at this overview blog entry.
In addition, Rob Tiffany has made a list of SQL Compact Merge Replication performance tips available here. This list is a summary of some of the advice in Robs excellent Merge Replication book. It even includes some of the improvements in SQL Compact 3.5 SP2, including the new PostSyncCleanup property of the SqlCeReplication object, and highlights the new support for Windows 2008 R2 with IIS 7.5 included with the SP2 server tools.