While my foray back into Windows-land hasn't been all bad, it has been mostly bad. Take, for instance, the following error I encountered.
Someone before me had installed our Exchange 2010 server, and with it Outlook Web Access (OWA). Ordinarily, this lets users check their email through a pretty ordinary web mail interface. Ours, however, simply displayed a big, white, blank screen whenever you visited it. Helpful error messages, anyone?
It turns out that, in addition to installing all of the prerequisite components, you also need to enable the Net.Tcp port sharing service or else nothing works.
Luckily, a few random searches and forum posts pointed me to the Exchange 2010 Prerequisites document that had all of this laid out. I hope posting it prevents someone else the same frustration!