River Tarnell has ported Open Web Server to HPUX.
Since Open Web Server is a fork of Sun Web Server, and SWS currently is built and supported on HPUX, what River has essentially done is provide the missing make files, dependencies, and other technical doodads that Sun elected not to make available when they created Open Web Server.
Great job River!
Now we just need to see if someone will do this for MacOS X.