I propose that we link http://en.wikipedia.org/wiki/Wikipedia:Submission_Standards from every edit window starting on Wednesday 21 January unless there are major outstanding problems with that page at that time. Visit that talk page to discuss this issue.
Two of the biggest pros, IMO, is that it gives our mediation and arbitration processes legal force and it also designates the Wikimedia Foundation as "your non-exclusive agent for copyright compliance".
BTW, Alex, our de-facto pro-bono lawyer, wrote the submission standards. But I'm sure he would be the first to say that they do not constitute a legal opinion.
This line would be added to: http://en.wikipedia.org/wiki/MediaWiki:Copyrightwarning
By clicking "save page" you agree to [Wikipedia:Submission Standards] and affirm that you submission does not violate those terms.
Since Copyrightwarning does not parse wiki, [Wikipedia:Submission Standards] would actually be <a href="http://en.wikipedia.org/wiki/Wikipedia:Submission_Standards">Wikipedia:Submission Standards</a>
An example of how this would work is already on Meta: http://meta.wikipedia.org/w/wiki.phtml?title=Meta:Sandbox&action=edit
This was done by editing: http://meta.wikipedia.org/wiki/MediaWiki:Copyrightwarning
-- Daniel Mayer (aka mav)