I actually have a update that I'll be posting soon that has a couple of fixes. The reason that none of the play artist xxx would work w/o the use rrmeda option is that the blank xml templates it looking for when doing a scan to build them,where missing from the installer (oops!).
Currently there is only a hacked up way of doing a voice search that I came up with a while back but now that RRMedia is incorporated, it could be done much cleaner right in the plugin. I will work on adding this feature as it would be nice to have as well.