Still working on adding photos to a forum post, but you can go to the Inukshuk photo gallery and see several images of the Cubenflator - not a how to photo spread, but you get the gist of it.  See the Cubenflator album inside my portage dog main album. 

As far as the Pumphouse goes, it's pretty small and would require multiple cycles to fill an air mattress.  Compare the specs.  Being generous, it will hold 6.5-7 cubic feet of air and weighs in at 1.5 oz for a cost of $20 plus tax and shipping.  All in, probably close to $30.  I built the Cubenflator for about $45, all in.  It weighs in at 1.375 oz., and hold an amazing 35 cubic feet of air.  Subtract a few cf for the rolled top and you still can fill a big pad in a little over one bag worth of air. 

Everyone has their preferences, but I'll take 3.5 inches of Big Agnes Q-core padding for a good sleep over a few crinkles of noise any day.   :thumbup

pd