Amarok 2 beta 3 has been released and packages are available for Kubuntu 8.10, the Intrepid Ibex. These packages replace existing Amarok 1.4.10 installs.
Amarok 2 beta 2 has been released and packages are available for Kubuntu 8.04, the Hardy Heron. These packages install to /usr/lib/kde4 and can be installed along side your existing Amarok 1.4 installation. Packages for the development version Kubuntu 8.10, the Intrepid Ibex, are available as well.