Maplesoft just posted a new page giving more details on the upcoming version of Maple 11 for Windows Vista.

Maplesoft is currently working to ensure that Maple 11 is compatible with Windows Vista.

This web page contains information describing the current status of Maple 11 support for Vista and how you will be able to receive it when it becomes available. This information will be updated frequently as Maplesoft prepares to support Vista.
 

When will Vista support be available?

The Vista version of Maple 11 will be available in the coming weeks.  Current Maple 11 users will be notified via email as soon as it is available.  Users can also check this page for updates.
 

How will I get the Vista version of Maple 11?

It will be available to all users running Maple 11 via a download that will be accessible through this web page. Users will need their purchase code used at the time of purchase to download the software. There will also be an option to order a CD copy.  More details to come.