Screen size statistics

I've been using Google Analytics for several months now, and one of the most fascinating things I've learned about my site visitors is how many people still use relatively small monitors.
50% of my visitors use 1024x768. This doesn't surprise me, I know this is still the most common resolution.
20% of my visitors use 1280x1024, which is the same resolution I use at home. The increasing popularity of LCDs which tend to be of the 5x4 ratio explains this fairly well.
Surprisingly, a solid 8% of my users are on 800x600. This is the third most common resolution of DA!'s visitors. There's a reason why we're still told to make sure our designs fit in 800x600 screens at work. That's 1 out of every 12 visitors to my site!
In a graphics-savvy community where 1280x1024 is considered small, people still need to remember: design your website for the least common denominator -- the 800x600 crowd. They're still a sizable portion of the internet at large.
(This of course means nothing about designing wallpapers; design them as large as you feel like, for sizing down will leave less artifacting on the image than sizing up.)
As a final note, widescreen resolutions are growing in popularity as well - a bit over 10% of DA!'s visitors use a widescreen (16x10) resolution.