So now I had all the software installed and working correctly I could catch up with work, and just get used to using Linux on a day to day basis. I also had the security of a fully functional Windows installation to fall back on, should everything go wrong, or should I have forgotten to copy something across.
But up until now, I'd only been using a Wired connection. The built-in wireless on my Thinkpad R51e didn't work with Ubuntu, and a few attempts to fix it were not rewarded with success. I decided to wait until I had a weekend free to sort it all out. In the interim, if I needed wireless, I had a Buffalo Airport PCMCIA card which worked perfectly when I plugged it in.