Amarok is a great music player for linux. In the current release of Kubuntu 9.10 Karmic also the current stable version of Amarok was introduced into the repositories. However Amarok is under heavy development and updates won't be included in the official repos. If you want to be up-to-date and have the latest Amarok version available, you'll need to compile it yourself. Compiling Amarok isn't really hard but there are a few dependencies that it needs and a few things to look out for.