I noticed what I think is a bug (or maybe a limitation) in SharePoint 2010. When I use PowerShell to create a Host Header Site Collection, SharePoint does not create a binding in IIS. If I add the binding manually, everything works great, but I would expect SharePoint to do this for. Am I missing something?
The following PowerShell script will create a new web application. Note that I have the option to add a host header.