LK: I upgraded the Iceware HTTP server to Apache 2.0.40 on the 12th of August (running Windows). So the Windows binaries weren't released on the 15th.
Also, the php4apache2.dll library from PHP v4.22 works fine with Apache 2.0.40.
Allen: You're referring to hardware requirements?
If so, anything will do. As long as your computer can run the Windows version, Apache will function.
Or that's my experience, at least.