Pretty good links and resources for installing EE on IIS6, 7.
Check this:
Installing ExpressionEngine on IIS
Sorry if this was linked elsewhere I hadn’t seen it.
This podcast answered a lot of questions:
TechNet Radio Interview on Managing PHP on Windows using FastCGI the first 15 minutes covers many developments of running php on IIS.
Setting up FastCGI for PHP -vista PHP server basic install video tutorial screencast
Things are looking up in iisLand, now about that darn mod_rewrite :(
These are concerns for a minority here on the boards, totally sure of that. 😖