Mobile solutions on the Microsoft platform, programming, and stuff that's swell!
Microsoft has now RTW'd (release[d] to the web) the final bits for SQL Server Compact Edition (SQLce) 2005 (aka SQLce 3.1):
Go get the bits and be certain to read the associated KB articles.
UPDATE 4 (2007-01-21): Links from this post removed, go see this post for SQLce 2005 RTM info. UPDATE
Last week, I attempted to install the SQL Server 2005 Compact Edition Tools for Visual Studio 2005 Service