This was a strange one today. Not sure what the brainstorm behind why the change in IIS (sigh, so much has changed in Windows Server 2008 IIS). I wanted to bind a SharePoint Web Application to a second (additional IP) address I added to my Windows 2008 Server. In Windows Server 2003, once this has been added, I can simply ‘pick it’ from the drop down list, in IIS.
In Windows Server 2008, your new IP won’t appear in a dropdown. In fact, you need to ‘type it’ in (so watch for typos 😉 the binding’s field yourself, when adding an additional IP Address, is necessary. I’m assuming there is a really sensible reason (or perhaps a lazy programming one) behind it, but at least I now know what to do for next time (and perhaps this is helping you as well).