If you've been reading this blog or the SQL Express Forum you've undoubtably seen me write about SQL Server 2005 Compact Edition (SQL CE) as an alternative database for use when writing client applications that require local data storage. SQL CE is the evolution of SQL Mobile, with support added for Windows desktop operating systems. The SQL CE team has been working hard over the past months to do all the right things to make this a great product for desktop database development and they've just released! I'll let you explore to find the details; if you're developing applications that require local storage, be sure to check out SQL CE.
SQL CE Product PageSQL CE TechNet PageSQL CE Developer Center