2008/11/3 geni geniice@gmail.com:
What are the terms of the agreement? There are various ways of implementing duel licensing and I would like to know which ones are legit.
[begin quote from Richard] * ALL contributors agree to the following:
Wikipedia can release their newly written text under both GFDL and CC-BY-SA in parallel. However, if they imported any external material that's available under CC-BY-SA and not under GFDL, Wikipedia is bound by that.
* All old revisions are released under GFDL | CC-BY-SA.
* All new revisions are released with this license statement:
This page is released under CC-BY-SA. Depending on its editing history, it MAY also be available under the GFDL; see [link] for how to determine that. [end quote from Richard]
This is not set in stone; we can modify some aspects of it in consultation with FSF as long as the overall spirit remains intact.