(updated below) I've decided to upgrade the site, mostly to deal with behind the scenes issues which I'll share later.
To do it in the cleanest way possible, I'll be taking the site down for most of the weekend. There won't be any new posts and you'll likely encounter a placeholder page.
Thanks for your patience.
UPDATE: Maintenance went smoothly and there was minimal downtime this afternoon. There are a few minor upgrades still in progress and I need to further test several items. But with these exceptions, normal blogging will resume. Thanks again.