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One feature I'd like to see is a Licence notice for the keys. The site software is GPL (hooray), but nothing it said about the keys.

Personally I like the http://creativecommons.org/ system, which offers a range of eas?-to-understand choices (http://creativeco...ml?lang=en) and creates a licence from your choices with a simple summary for human beings and a page of legalese for layers.

It is probably best to give key authors full freedom to choose any system they like, but perhaps you could add a 'Licence:' in the key header template or at least a FAQ entry on the topic.