A clarification has been made to this ColdFusion technote. The current support policy can be summarized as

  • ColdFusion MX 7 is supported with a supported 32-bit Java VM running on supported operating systems on 64-bit hardware.
Although, you should read the technote for all the details. Previously, the technote generalized incorrectly that ColdFusion would not run at all on 64-bit platforms.

See also:

Performance Considerations for Running ColdFusion MX 7 on 64-bit JVM