Rob has been furiously writing up a storm. He has been working hard on his book even during his recent month long vacation throughout the US. He has just recently published one Chapter from his upcoming book titled Windows Mobile Data Synchronization with SQL Server 2005 and SQL Server Compact 3.1, for anyone who's interested to read on his blog. http://blogs.msdn.com/robtiffany
He'll be releasing them on the web as he writes them and at the end will be publishing a complete book. Go download it quick!