Pisco Sin Fronteras in Pisco, Peru has been working with earthbags for some time and their last project, just completed, is a community center. They have detailed how they went about building this at their website and we have assembled this information on a project page about it at www.earthbagbuilding.com.
You can also see a YouTube video about it.
That is a beautiful place, and the house is very cute.
I see they are pinning bottoms of bags too much and creating recesses in the wall that require much more plaster.