The licensing website does have the different suites available, although
you're right that MSDN and Technet are limited to Professional.

I was able to find the answer by taking another look at the comparison
matrix. At the bottom, it says that Communicator isn't due for release until
2007.

"Patrick Schmid [MVP]" wrote:

> You downloaded Office Professional, not Professional Plus.
> MS has not made other SKUs (except the Enterprise one for VL) available
> for download right now. Probably they are trying to prevent their
> servers from going down under the load.
>
> Patrick Schmid [OneNote MVP]