Here's a quick summary from hyslopc on AVSForum. Maybe it will help someone.
"OK, got it working! I finally discovered how to configure NetRemote - you do it from the GUI itself using menu option File | Configuration (which should have three dots after it, BTW, since it results in a dialog box). Then under "Loaded Drivers", click on "MediaJukebox driver", then "Configure". Change the IP address, hit OK twice.
"Then in MC9, I did as Mastiff said: "click on Plug-ins at the bottom of the left main window in MC9, where you'll see WebRemote". From there it was obvious that I had to change the port to 8080, click auto-start, save, and then click on "start server".
"So I have a connection now at last. Got a runtime error in MC9, but that's probably just an issue with the beta.
"Here's a question - would it be so hard to just copy the info I posted here into a readme.txt, and include that with the NetRemote download? As it is now, new downloaders have no clue whatsoever how to get it working (at least I didn't, and I'm a Windows programmer)."
-- hyslopc
[the problem with the runtime error is a result of Playing Now being empty -- JimH]