Very interesting editorial on the Jet vs MSSQL although I think that bringing Exchange into the disscusion is a bit of a red herring. Microsoft has been trying to get ride of MSACCESS for years and yet access remains. MSACCESS could have been ported to MSSQL and yet it hasn't been.

Maybe the Jet is better than MSSQL(in some casses at least). Maybe the Jet is the one example of NON-blotware in all of Microsoft.:)