Those of you that have been around for awhile know that I have been talking about Bigelow Aerospace and their experimentation with inflatable space modules. Bigelow has launched a couple of their modules that have proved extremely successful.
Now Bigelow Aerospace has petitioned NASA to build and attach a module to the ISS. The unit(s) are called Bigelow Expandable Activity Modules and their initial use would be a technology demonstration unit. What makes Bigelow's modules so unique is they are inflatable. The units are held rigid by internal air pressure. Bigelow's two previous test units proved uniquely durable, performing as expected in earlier test. The success of these test are what NASA based its decision on.
It is not clear yet if the unit would be for on board astronauts to add to their living space or for use by Bigelow as space of tourists. Bigelow has stated in the past that they are planing to build a low Earth orbit "hotel" to which they would shuttle tourists to and from.