If you just need itunes control,there is a program called patioTunes which allows you to control itunes via a web interface from any computer on your network (or off if you set up port forwarding on your router) its had its interface opermised for palm as well.Another option is a bluetooth connection using salling clicker, if you have bluetooth on your device and arn't going to far away from the computer, its also got quite a lot of customisation options if you know any apple script.