Personally I'd prefer no leadership att all. The more decenentalized the better imo. Of course we need people that are active in the community and speak in favor of bitcoin but I don't think we need anymore organizations that speak the word of bitcoin. Let the market do it's job. When it comes to MtGox the market is doing just this with the increasing spread between Gox and other exchanges. Think it's working perfectly in that aspect. If MtGox problems increase the market will keep "judging" it in the way it requires.
The creation of an entity or several entities
is the market. I applaud and would actively support such a hopefully positive endeavour. The Foundation is one thing - I don't see this thing mirroring that concept. You can have an organisation/entity that supports grass roots, supports the very nature of the decentralisation.