Many of those in the SEO, SEM, Web Design and related businesses find themselves working on holidays such as New Years and Christmas. I think it is more about the self-employed mentality versus it being computer related. Of course, computer related jobs tend to be good to work at any time. In any event, it is nice to know that you are not the only one working on these days. That is why we have Twitter and such.
I tend to report every year that I spot Googlers working on these holidays. Googlers were working on this past Christmas and they, JohnMu, was working on New Years day.
Happy New Year all!
Forum discussion at Google Webmaster Help.