Cayenne MY 2006...read it here first!
The changes for MY 2006? Well, same power, same weight, same look. BUT...PCM system comes with MP3 support (Hallelujah, we prayed for that ), the phone voice activation/operation kit will be available too and there will be some minor mods/fixes and for example the rear 20'' Sport Techno wheels will be available in the 10'' size only on new cars, no more 9'' size.
Other changes? Minor changes, nothing really worth mentioning.
Expect the facelift for next year, MY 2007...summer 2006.
Now this (MY 2006 info) is NOT a rumour, this is confirmed information.