Apologies but yep the wiki was unreachable for several hours this morning. I don’t know what the cause was. Probably it was somehow related to our recent (labor-intensive) upgrade to the most recent MediaWiki version. Thanks greatly to Greg Sabino Mullane and Steadfast Networks for getting it back up.
In the future, if necessary, you’ll be able to find notes about server outages here, on this blog, or (if the blog is down, too) Citizendium-L (which is hosted by Purdue — partly for reasons of redundancy). If there is an outage and nothing has appeared in either of those places, then please assume we don’t know about the outage yet, and report it. I was offline this morning (writing), so I didn’t catch this until late, and people no doubt just assumed I knew about it and that I was working on it…but I didn’t and I wasn’t!