Destinator 6 uses 2006 maps from NAVTEQ.
Destinator 7 is only available for PND (Personal Navigation Devices) and Destinator does not plan to introduce a PDA version. Hence, they will not be a version 7 for PDA. This info was received from one of Destinator's sales representatives and it is true as of writing.
Please consider alternative solutions such as:
Garmin Mobile XT
iGuidance 4
OnCourse Navigator 6 (version 8 coming soon)
TomTom Navigator 6