Partners can now download Dynamics AX 4.0 from this location:
US and Canadian customers can get the code by contacting their Partner. Existing customer licences will however not be updated until late 2006 when more languages are available. If a customer in US or Canada needs to upgrade sooner, the Partner can place a service request with Sales Operations.
I'll keep you posted in regards to other regions when I get to figure out the schedule.
Also you might want to register for the Dynamics AX launch event in Boston where Steve Ballmer and the Dynamics AX team will celebrate the worldwide launch.
This posting is provided "AS IS" with no warranties, and confers no rights.