well they did the venting right, but I went to a seminar on how to do straw bale construction... ok so a few things...
1) they sell these big wire staple like things for binding the straw bales together, then you use rebar and heavy wire and wire mesh to build a structure in and around them, which works very well.
2) if your only doing it just for a garrage in the winter, you likely dont need more than the bales (bound together) themselves, maybe with some aluminum siding...
3) if you cover it in mud or papercrete, you might have some serious problems come summer... the bales themselves have to be soaked (litteraly) in an anti-flamable liquid, then dried for a very long time (I think open air for a month or more) before they can be used, otherwise when it heats up in the summer, it can start to smoulder and then actually burst into flames inside the walls. so I dont know if they did it this way (maybe their just relying on good venting to keep the bales from smouldering?!?!) also note: strawbale walls are always shifting and bloating or shrinking... if you just slap on mud on the side, your going to have to be doing near constant repairs.