  Spintronics is the ability of injecting, manipulating and detecting electron
spins into solid state systems. Molecular-electronics investigates the
possibility of making electronic devices using organic molecules. Traditionally
these two burgeoning areas have lived separate lives, but recently a growing
number of experiments have indicated a possible pathway towards their
integration. This is the playground for molecular-spintronics, where
spin-polarized currents are carried through molecules, and in turn they can
affect the state of the molecule. We review the most recent advances in
molecular-spintronics. In particular we discuss how a fully quantitative theory
for spin-transport in nanostructures can offer fundamental insights into the
main factors affecting spin-transport at the molecular level, and can help in
designing novel concept devices.
