The last SQL Server 2005 Update letter by Paul Flessner introduces an interesting new "brother" for the SQL Server 2005 family: SQL Server Everywhere Edition.
It's too late to say exactly what will be the real feature, but this "Everywhere Edition" seems to be a light SQL Server version that you can integrate into your application. This new version will have synchronization capabilities with other servers and seems to be useful to build applications that are not always connected, for example a smart client application.
These are the Flessner's words: "This new offering for storage on clients of all types will provide a lightweight, compact, but rich subset of the capabilities found in other SQL Server editions. Beyond having rich local data management capabilities, SQL Server Everywhere Edition will also include support for seamlessly synchronizing with other SQL Server editions and provides features that promote building rich client applications that operate effectively in today’s increasingly “occasionally connected” environment. SQL Server Everywhere Edition also shares a common programming model with the other SQL Server editions, enabling developers to transfer skills and knowledge quickly and easily. We expect to ship the first CTP of SQL Server Everywhere Edition this summer, with the goal of final release before the end of this calendar year."
Sounds really interesting... 