Steve Lasker recently posted 3 great screencasts on SQL Server Everywhere Edition:

Video of installing the SQL Server Everywhere Edition CTP

Screencast of Deployment Options for SQL Server Everywhere Edition 

ADO.net Programming options for SQL Server Everywhere Edition

I just watched all three of them.  Great stuff!

I like that we have chosen two deployment approaches for SQL Server Everywhere Edition.  You can either do an MSI install or a private deployment.  The MSI approach will work with ClickOnce deployment but requires use of the bootstrapper and administrative priveleges for initial install.  The benefit of this is that SQL Server Everywhere Edition will be updated by Windows/Microsoft Update.  If you go with private deployment, it's up to you to service your application and make sure you deploy updated SQL Server Everywhere Edition bits to your apps ClickOnce server(s).

-Marc