Nuance released an update for Dragon NaturallySpeaking for 64bit  and Windows 7 users.  The update is known as version 10.1.
The version 10.1 download is very large.  It may take several hours to complete on a fast internet connection.  If you would refer to receive a physical copy of the updated application, rather than a download, you may order a DVD by calling your dealer.

Verification Source: Nuance Website