Control iTunes from any Mac with PatioTunes
Here's an interesting application that will allow you to set up a Mac as a dedicated iTunes server, and control it from anywhere in your house. With PatioTunes, you can control a Mac running iTunes from any browser on your network. Once running, PatioTunes lists the internal URL that it's listening on, and waits for you to launch a browser. From there you can pick artists, albums, or playlists, control play and pause, set the volume and more. Best of all, you can leave your kung-fu at home, as there's no web publishing to enable, no Apache web server to tweak, no vulnerabilities to worry about.
The key phrase here is "from any browser on your network." PatioTunes supports several Palm devices, including The Lifedrive, the Tungsten C, several Sony Clie's and the Zire72. A number of PocketPC PDA's are also supported, like the Dell Axium X3i and the HP iPaq rx3115. For a full list of compatible PDA's, look here. Version 1.6 of PatioTunes will even let you use your Palm to quickly create a PatioTunes playlist.
Sounds pretty cool, and there is a 14 day free trial. A single license will cost you $15US. PatioTunes requires Mac OS X 10.3 and up.