At least this got modded down, but it's threads like this where you discover how many ignorant 'nerds' there are on /.
Ohm's law does not only describe resistors. While the schoolboy formulation V=IR (also, admittedly, the law Ohm actually published) describes the instantaneous relationship of voltage and current through a resistor, in modern engineering and physics it is generalised in various ways. For circuit analysis, it becomes V=IZ, where Z is the complex impedance, and describes the time-varying relationship of voltage and current in resistors, capacitors, inductors and pretty much anything else you will find in a circuit. For things other than circuits, the generalisation J=E\sigma describes the relationship between electric field intensity, current density and conductivity.
While certain materials are described as 'non-Ohmic', what this really means is that \sigma is not a constant for those materials and depends on something else, usually the value of E.