Well, I've been busy finishing a large piece for PTV so that has kept me pretty busy. I've spent some time working on the matterial Playground code. I'm redoing the Glade file to work with the new layout spec. My next task is to start interfacing the objects in the UI file to real code. Man, I really love libglade.
Here is a quick background on my thoughts for Playground. Using libglade, I will load the file (with mf_loadui) playground.glade and expose certain objects to Foundation. When an extension loads it will be given a new "sandbox" to draw its interface in. This is the current thought at least. We shall see.