Did anyone else notice that the ISOs have to be stored on a FAT32 partition? Doesn't this limit you to maximum 4GB ISOs? The OS X Snow Leopard ISO (at least last time I checked) is about 8GB. Seems pretty limiting to use Fat32. If it's a self contained system, why not use a better filesystem?
We're supporting FAT32 because it's the most universally supported (and easiest to support).
Other filesystems will be supported in future updates, for sure. In the meantime, the management software will split the files automagically into .iso.1, .iso.2, and so on (or you can do this yourself).