UPDATE Aug 30 2010: you may also be interested in my Arris TM602A password of the day generator.
In my new house, my ISP (Cabovisão) installed a new cable modem, a Scientific Atlanta Webstar 2203c.
It's a stupid modem. Really stupid. If I unplug the ethernet cable (or the USB cable, which I don't use) and plug it into another computer, the modem has to be reset so it can adapt to the new hardware - these were the words from the tech support guy, not mine.