It figures; just days after getting everything together and uploading the first major revision to Robservatory, WordPress goes off and releases version 2.1! Sigh.
I intsalled version 2.1 on my local copy of the site, then ran the upgrader. That portion of the process went quite well. However, in trying to re-enable my collection of plug-ins and widgets, I found that many of them don't seem to get along with WordPress 2.1 at all--enabling certain plug-ins completely breaks the site's display, for instance.
So, for now, I'll be keeping the site on the 2.0.7 release until more of the plug-ins are updated.