Memristors are a fourth class of electric circuit, first hypothesized way back in the 1970's, which are a new addition to the transistors, capacitors, resistors etc that go into making a silicon chip. HP has put a great deal of resources into developing this technology and is expected to release memory-like memristor products in 2013, so it's not far off from commercial deployment. Now however, the Korean Advanced Institute of Science and Technology (KAIST) have found a way to use memristors to make what they describe as a "fully functional" flexible resistive random access memory (RRAM). This memory is built on a plastic substrate and can be randomly accessed, written to and erased. However, as this substrate is flexible, it can be bent and rolled up easily, opening up possibilities for use that haven't even been thought of yet.