Use internet explorer (never thought I'd say this).
You need to accept an add-in called "MS transfer manager".
The site generates keys but seems a bit buggy, also can't verify which of these products need a key.
At least it generates a key for Applications > Office XP > Office XP Professional - CD (English) : JPXQJ-...
Some keys show up others don't, I'll upgrade my IE to 8, let's see what happens.
Edit: After update to IE8 I get a descent error warning: "An Error Has Occurred: There was an error error while trying to retrieve requsted key information and we cannot process your request.
You can try to:
- your browser and retry the operation again in a few minutes.
- Contact Support
- Read the On-Line Self Help
Reference Id: 19497582
This error has been logged with the reference number noted above. Please use this reference number if you contact support."
Are you using the key against the installation media provided via TechNet? I've tried applying my MSDN keys with Windows Vista DVDs I've had laying about with no luck before, but then I burned the .iso provided by MS and it went off without a hitch.
edit: keys generate for me just fine (I'm using Opera as it doesnt seem to work in IE7), and the downloads also work.
Make sure you have registered your Subscriber Benefit Access Number (BAN) number on your receipt to activate your account!