Today was high tension at work. Our US parent company was infected with the latest Microsoft worms spreading via the latest critical security holes announced last week. Our operations in the UK were largely unaffected, we have more XP clients than 2K, and as a general rule being a smaller operation IT are able to keep our machines up to date faster.
At home I run Debian GNU/Linux on everything, so everything was safe and sound without any intervention. I'm not complacent though, I check my boxen every day, and keep them nice and trim - in line with the Debian security servers.