Amarok is a great music player for Linux (under KDE), which in their previous version (1.4.4) added support for listening and buying Magnatune music directly inside Amarok itself.
Now, Amarok 1.4.5 is out, the 2nd version to support Magnatune. Nikolaj Hald Nielsen, who developed the Magnatune addin to Amarok wrote me to tell me that this version fixes all the known issues and adds quite a bit of polish to the Magnatune store.
The Amarok programming team is currently moving Amarok to a major new version of KDE, the graphics environment it's programmed in, and Nikolaj's blog gives a deep explanation of how it's going.
The OpenSuse Linux Maintainers have corresponded with me and their 10.2 version is out with Amarok 1.4.4. I haven't checked it to see if they did include Magnatune support in their Amarok distribution in the end -- they had some concerns that I believed to be addressed.
I'm *really* excited about the major Linux distributions including Amarok 1.4.4 as that greatly increases our user base and visibility to exactly the right crowd for us.