Ars Magica and Open Licensing

[Euphemism]

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Open Ars Magica?

On Dice.camp, John Nephew has just floated the idea of an open-licenced Ars Magica SRD: (The ORC licence is Paizo and a bunch of other game companies' proposed replacement for the OGL, if you've been following that mess) I'm interested in this idea, and wondering what would be open-licenced. If its an SRD, that means rules only, not Mythic Europe, but if the basic Hermetic magic system is included, then that's enormous scope for people to write and publish the alternative modern / renaissanc…