  It happens to us all occasionally. I've used and configured Apache/Tomcat, IIS and Resin, and I have to say IIS comes out as the worst of the three in my opinion. It's arguably easier to configure than Tomcat, and definitely easier than Resin, but other than that it sucks ass. It's not very powerful and, like ASP, I find it a bit clumsy. I like to Be In Control. Plus IIS probably isn't very secure. That Onion article from 1969 is pretty funny this week. 
