From a recent edition of "Wired" on-line magazine. It will be real interesting to see what changes in the basic formulas for calculating total current, voltage when you don't actually know the starting resistance.
http://blog.wired.com/gadgets/2008/04/scientists-prov.html
"The new component is called a memristor, or memory resistor.....
…..a group of scientists from HP Labs has finally built real working memristors, thus adding a fourth basic circuit element to electrical circuit theory, one that will join the three better-known ones: the capacitor, resistor and the inductor."
