I received this response from Konica Minolta on June 3, 2010:
Hi Patrick,
First, we sincerely apologize for the terrible delay in responding to your question.
Unfortunately, there are no Windows 7 drivers for the magicolor 2300W, and there will not be any Windows 7 64-bit drivers developed. I regret to say that we can offer no workaround for you to use this printer with 64-bit Windows 7.
If we can be of any further assistance please let us know.
Regards,
Customer Support Team
Konica Minolta Business Systems
219905