Some more improvements to Swami again tonight. The wallpaper switch is now functional and will even import pictures as wallpapers. The theme selector back end has been redone thanks to some help from Kai and it now applies smoother than it previous did. Please note you will need to run your system updates for the latest theme switcher to work as it requires the updated version of Moksha from today.
Two known issues with the wallpaper tool I will fix next time I have a chance:
1.) Importing images with spaces in their name does not currently work
2.) You have to change work spaces for your wall paper to actually change after hitting apply.