This short blog post lists the main new features in version 3, with pointers to the menu location of the new features in the upcoming version 3.0 of my SQL Server Compact Toolbox add-in for Visual Studio. Please go ahead and download the preview, and let us know what you think.
Extensive support for Sync Framework 2.1, including Provisioning, Deprovisioning, Code Generation, Local Database Cache Code Generation and Explorer tree integration - thanks to great effort from fellow MVP JuneT (blog | twitter)
Generate desktop LINQ to SQL classes both for 3.5 and 4.0 databases (see this blog post for more info)
Script only data (with "correct" table ordering, using QuickGraph DataSetGraph with Topological Sort)
(Database context menu)
Add own Compact 3.5 based connections when using Visual Studio 11 beta
Go and try it out, and let us know what you think!