If you are interested in using PoW as a distribution mechanism and PoS as a security mechanism,
NXT's monetary system offers such a solution.
interesting, but I'd rather add some PoS checkpoints on top of bitcoin than use nxt as a platform to launch a new Pow currency. I still think PoW should be the main security mechanism.
plus generally, I'd prefer to go with Bitcoin over any alt as it has a much better network and adoption.