Nice coverage of Music Now, with it being heralded as a "standout service". The conclusion being:
"Unlike its rivals, Music Now requires no client software. All you need is a browser, and you can play any song or playlist in the entire catalog. You can listen at the office, a friend's house, or a Web café as easily as at home. The music videos are a great addition, and the new XM Radio section really rounds out the service. Unfortunately, you don't get remote access to your locally stored music library, and support for the Firefox browser is weak."
Rick's points are valid, but in the meantime if you are looking for remote access to files - I'd suggest checking out the latest build of Winamp, which integrates Orb's great remote access services.