ASP.NET Scale
Usually I dont care about traffic stats and such but I was reading some of the news generated by my latest project and noticed that for a time we were one of the 300 busiest sites on the net! Since May we have seen over 120 million hits and Win2K3 is loving it!
The best part, the sites runs off a single dual proc web server. We have a hot standby ready in case that box dies but racking up that traffic on a single box is pretty impressive to me :)