I've installed MOSS 2007 a number of times, but I always run into the same problem. The installation goes just fine, but MOSS seems to be missing functionality.
In the Administration page, clicking the 'OK' button in Create or Extend a Web Application does absolutely nothing. Also, clicking certain links evoke no response either. I think something is wrong with my setup. All of the links that do not work display javascript in the bottom-left of the browser. I'm not sure if that has anything to do with it.
I'm running MOSS 2007 on Windows Server 2003.