And I bet this isn't an exact representation. There are far more people who visited the site than there are dots on the map.
This is correct. It's displaying the 500 most common visitors from the past week or month (I forget which I had it set to at the time of snapshot).
It's also worth noting that last week Firefox users surpassed IE users for the first time. IE has been hovering at or slightly below 50% for some time; two weeks ago it was 47 IE - 44 FF, and last week it reversed to 48 FF - 44 IE. And for the curious, Opera had 2.9% and Safari/Konqueror 1.6-1.7% each.
In other stats, a mere 13% of TSCers use 800x600 and force me to make the site lowres-friendly to the detriment of the rest of us. I'm increasingly considering making a lowres-friendly skin for them and abandoning them in the future.
As I look at the traffic stats again, it appears that Saturday blasted through all previous records once more. There were about 50% more than our regular Saturday visits (487), but more astoundingly, the most fervent visitors ever, with 19.4 pageviews per visit, combining for triple the average total traffic. Once again the inescapable conclusion is that we are awesome. X) And it seems that the reasonable assumption that it's due to an influx of new EC/F-Zero traffic is incorrect, as 73% of this weekend's traffic was returning visitors - the historical average is 65%, and October average 69%.
Google Analytics gives tons of random info of that nature, I find it all quite interesting.