Well I know
this is where you can find a great hotmail viewer. I think that the RIM advertisment is saying that you can access Hotmail, but not necessarily directly through built-in SW. (you know marketing, say what you can do including all possible 3rd party apps)
From the Outlook perspective, although 2k3 supports hotmail, it is as a viewer only and you can compose and send e-mails from Outlook but it is logging into your hotmail account on the back end to do it. I have some sniffer traces to prove this. It is only an different front-end but still confined by the limitations of hotmail, therefore redirection is not available because the Outlook SW is not actively involved with hotmail messages...
I do have a lot of data to support this, but if anyone out there has a different spin, please post because I am curious about this as well...