No need to worry - I'd left the PC on and running Foldershare's satellite - so I could fire up a browser session, connect to my account on their web site, and copy the files I needed onto my PC. I was able to get what I wanted written, and still have time for a venti chai latte and some lemon ginger cake...
Foldershare used to be a pay for service, but after Microsoft bought it, it switched to free. There are OS X and Windows clients, so you can copy between OSes happily - and you can have more than one PC associated to your account. You can use it to automatically sync files between machines, but I'm sticking with just using it as a low bandwidth VPN solution.
A useful widget.
...and no spyware or adware either