There is plenty of information and discussion about PoS : PPCoin is of course the currency with longest history in PoS..

CGB has good developers who are endeavouring to make the best decisions at an early stage of what is, after all, still experimental software.

I really am not qualified to pronounce on the technicals, but it seems to me that a network composed of a very large amount of 'dust' ie vast numbers of users each with low hash power, is the most secure for either PoW or PoS.