I started up a KickStarter project: "Wing's DIY Light Modifier and DIY Book" on April 8th, 2011, welcoming backers to commit to funding the project. Funding closes on May 20th, 2011.
The idea behind that project was to create light modifiers with big light look and feel, but can be packed away in a small space. The personal goal was and is to be able to fit a 7-8' octabank into a backpack, along with other light modifier gear and light stands. The desired end result of the project is an eBook which will be delivered to all backers of $5 or more, detailing how one can build their own from readily available materials!
I've been tinkering with various forms of rods for the light modifiers and connectors. Have yet to start on the fabric, mounts, etc.