[This article was contributed by the SQL Azure team.]
We have blogged in the past about SQL Azure to SQL Azure synchronization using Data Sync Service for SQL Azure (Introduction to Data Sync Service for SQL Azure). However what if Data Sync Service doesn’t do exactly what you want? It stands to reason that the Service will be adding more features as it matures, however if you need a custom synchronization you can easily program your own using the Sync Framework V2.1 Software Development Kit and a Windows Azure worker role. This newly published wiki article shows how to synchronize between two SQL Azure databases using the Sync Framework SDK and a Windows Azure worker role.
Read the Wiki Article.