MySQL DLL Files
I've just updated the MySQL DLL files that are included with the Windows download. There was an issue because the DLL files were for an older version of PHP. If you're trying to load the MySQL extension on Windows, please download the updated file here: http://www.scodigo.com/downloads/smartpill/php_extensions/PHP_Extensions.zip
Also keep in mind that our next version (due out in the next couple of weeks if all goes well) will include MySQL compiled into the plug-in (thus you won't need the external DLL files).
Regards,
Micah