I'm working together with PlanetMath contributor Raymond Puzio on a proposal that would improve the PlanetMath platform, making it useful for remixing contents from MathOverflow, math.stackexchange.com and other places around the web to produce mathematics textbooks -- for use on PlanetMath, and for export to places like Wikibooks. I thought this would be of interest to the community here, and I invite your feedback on the proposal, as well as your endorsement (if you feel so inclined). Any comments prior to the Sept. 30, 2013 deadline will be particularly useful!
I'm particularly interested in any policy-level implications or ramifications. You use the same license here as we do on PlanetMath, so that won't be an issue, but if there are other things we need to be aware of (e.g. related to crawling the site) please advise.