I realise this isn't a new topic, so feel to point me to further/background reading...
but what are the implications and legal subtleties of the difference between the licenses used on WV (GNU Free) and WE (CC Attribution)?
I would like to prepare a proforma letter to send to owners of copyright material which I use in my teaching (e.g., an image in a presentation), requesting permission for them to release the IP into a free culture license which would it to be uploaded into Wiki Commons or elsewhere as appropriate. My hunch is that > 50% could give permission.
If there is such a letter you know of or can share, please let me know.
Obviously it would be important for such a letter to cover all conceivable licensing contingencies.
Is the solution to dual-license materials? And could that be done, practically?