I just installed VideoLAN (http://www.videolan.org/) and all I can say is wow! Why wasn't I using this sooner?!! The default settings blow away my Zoomplayer and WMP10 defaults. The colors, and especially the black levels, are outstanding on my 30 LCD. It skips those annoying FBI warnings and adverts and goes directly to the main menu. It can play ISO files directly without having to mount them first (bye bye Daemon tools!). It is controllable by command lines. And best of all it can stream media over a network. The main things that it can do are plain Real media files and play DTS audio. It can support multiple instances but I'm not sure it can do multisource/multizone (ie independent and party mode across multiple zones) the way winamp does, however, again it does have network streaming to multiple sources...
I think we should all give this great FREE ap a closer look.
hjackson
PS Did I mention that it is opensource ...