Just wanted to add, that one can, after some recent updates in Debian Testing (Lenny), add the following lines to /etc/apt/sources.list

deb http://ppa.launchpad.net/project-neon/ubuntu hardy main
deb http://de.archive.ubuntu.com/ubuntu hardy main universe

and install amarok-nightly. However some packages in the Debian repo can currently not be downloaded via apt (size does not match). I fixed this by downloading this packages manually and installing them with dpkg -i

Amarok 2: Looks really good, very promising, but is definitely alpha-software (and will be alpha for some i think)