I'm all for this and have some similar projects in mind in slightly different niches.

I know people think that contributors won't want to put free effort in, or will hold back their best content, but really this type of project is like the ultimate guest posting opportunity. Add in some sort of promotional incentive like allowing you to use one ad spot on the page where your article appears and its a winner in my book.

In most professional industries the opportunity to be featured in industry publications is highly sought after. Should be no different in the WP community.