Does anyone know how I can enable the emusic store extension as demoed at http://blogs.gnome.org/wjjt/2011/03/13/emusic-in-banshee/ ? I have enabled the "eMusic Import" extension available in Preferences->Extensions, but that only lets you import emusic files, as opposed to browsing the web site within Banshee (as with Amazon).
That is a feature of the next version of Banshee which has not been released yet. You could install the daily build PPA but this is experimental and will likely break from time to time.
A much safer option is to wait for the next stable release which will be available in this PPA.