I agree completely, ShinChuck. When people say they want an "auction house", they don't actually want bids and auctions. So, rather than saying "I want an auction house", why don't people get more specific about what's really missing?
Pretty much all I've heard people wanting that is different from the current system is the ability to not have to walk in to the wards to purchase the item. Is there some more than this? I don't think that not having to walk into the wards is going to fix the significant problems in the economy as it stands (e.g. massive gil inflation, overabundance of items, inability to find price-point between buyer and seller).
So list those specific features, and we can get down to serious discussion!!(Believe me, I don't think the Market System is perfect or even works well. I simply object to the notion that a cry of "auction house" will magically make everything get better.)