We tried several different combinations of IIS, Apache, Webrick and Mongrel on Windows with a SQL Server backend.
Apache and Mongrel packs has been the best configuration by far.
Definately. I haven’t tried IIS, but I did try Apache + FastCGI and was terribly disappointed. Now I have Apache + Mongrel sailing along just great.
Yep, I'm running IIS, Apache, Coldfusion, and Mongrel on the same development box, no problems so far.
Ron