Mark,
We have had requests to install the DWF Viewer even when a user does not have admin rights to install. Although this might help us in the short term by getting more DWF Viewers out there in the world, I'm not convinced that we should be circumventing IT admin's who have purposely not given admin and install rights to their users.
I know that if I were that IT guy, I'd be mighty upset to find any software that circumvented this on my system. Even Adobe PDF Reader requires admin rights to install.
--Doug