Absolutely. Done, and linked to the original post, too, now that we’ve
unearthed it. 
Sure, let’s try it. In general I’d encourage people to propose updates in comments or threads so that they can be discussed and agreed upon by the community rather than being effected as unilateral changes, so I’m not convinced that “wiki by default” is the right model, but I’m happy to see how it goes in a few cases.