Stopped by my screen printer's today to put in a new order of Feral for Life shirts and was reminded of Jason Chaste's rad DIY project in his Teamscreen showroom...
He collected the styrofoam corners that protect your Apple G5 or MacBook during shipment and nailed them into the wall in a modular configuration. He then hung samples of his printed shirts over the three-dimensional wallpaper. 
Sarah over at ATSF recently posted a house tour where the dweller also reused packaging for an art project. Pretty nifty!
Phillip tells us, "I work in an office, and I have a hunch that it came from a laser printing cartridge package or something like that. I've been on the lookout for similar ones over the years, but haven't been able to find anything of the same texture or design." Anyone have something like this lying around and willing to send over to Phillip so he can make some more rad art? Support recycling and the creative arts! 
Photos: Top two, soniaz; bottom two, Phillip Maisel

Shaw's Original Fir...
I used to use those molded cardboard packaging thingies as buildings and cities for Hot Wheels. I'd draw windows, doors, bushes, stray cats, etc. on them with markers. BIG hit with the age 3-6 crowd!