Could it be possible to "fix" mdac as well? Because of wine now having a more or less stubbed oledb32.dll, apps that need mdac don't run properly anymore. Simple solution is to set oledb32 to native, before the mdac installer is started, (and leave it to native afterwards) Could that be added to winetricks?
Fixed in svn. In the future, please e-mail me/Dan directly, rather than all of wine-devel.
And/or file a bug at http://code.google.com/p/winezeug
Thanks for the tip!