When details of Windows Phone 7 was announced some developers expressed disappointment that the software did not come with a SQLite database component, with Microsoft preferring developers use cloud-based services for database storage.
Unlike others however Dan Ardelean did not just complain, but went about fixing it, and has produced a solution which he has made available to all developers.
He modified the csharp-sqlite implementation developed by noah.hart to work with IsolatedStorage, allowing simple local database support in windows Phone 7.
Download his proof of concept app at his blog here.