According to the latest from heise.de, Firefox and Gecko have made huge strides in the last year.
Jan '05 Jan '04 Mozilla & Co (Gecko-Engine) 44,1 % 28,0 % Microsoft 36,3 % 54,8 %
That's pretty amazing and it's pretty much all Firefox gains. In one year, Gecko and Microsoft have nearly swiched places in terms of marketshare. It's nice to see such a major site with non-IE users in the majority.