Now when I attach via cifs to the source (\\mojito.rtpse.netapp.com\vol1 in this case) I see a folder called "widelink". If it shows up as a folder (since CIFS clients wouldn't know what to do with a symlink anyway), that's a good sign that it will work. When I click on it, it passes me over to the "test" share on cosmo. In this case, it's a NetApp controller, but it need not be since 'mojito' is just sending a DFS redirect to the client when it hits my link.
Of course I am assuming good permissions on the destination side.
This is a small example, but I think it shows how it really works. The key is to come up with a pattern in the path of the link that can be matched by the symlink translator.