A friend of mine pointed out that my new site didn't look right. Turns out it was because he had JavaScript disabled. To what extent should I really worry about making my site work, and perhaps work correctly, with JavaScript disabled?

At first I was dismissive, but then I iterated a bunch of good reasons in my blog. So now I'm not sure.

Are the stats on how many people have JavaScript disabled? Do these people expect problems with sites? What is your experience?