I've switched the Oxford Guide licence to Attribution-ShareAlike 2.5
This essentially only formalizes the ability to attribute to a
collective work (ie the wiki) as was already detailed in the licence
policy, so this shouldn't affect anyone's rights in any way.
Dominic Hargreaves | http://www.larted.org.uk/~dom/
PGP key 5178E2A5 from the.earth.li (keyserver,web,email)