>I don't use Windows at the moment and don't really mount network drives, either. That might be a good alternative to consider.

Regarding Windows:

I have successfully mirrored a notebook and a desktop[0] (single user) with Windows using robocopy, which is a utility that comes with Windows (used to be part of the Resource Kit but I think it is now in the base product). When I say "mirror" I mean I can use either machine as my current workstation without any loss of data, as long as I run the "sync" script at each switch.

I use "net use" to temporarily mount a few critical drives on the local network, then robocopy does its work, it has maybe 85% of the same functionality of rsync (which I also used extensively when administering corporate servers and workstations). Back in the DOS days, I wrote my own very simple version of the same thing using C, but when robocopy came along I was glad to stop maintaining my own effort.

[0]or two desktops, using removable high-capacity media like Iomega zip drives.