Not to downplay the effectiveness of this thread but I find it much more useful if people post on the actual persons profile wall with positive/negative transaction comments. My first inclination when dealing with an unknown seller or buyer is to check their profile, so seeing something on their wall that says successful transaction is a lot lore convenient than having to read through these 3+ pages (and growing).
See my profile for an examPle, I'm asking that people I interact with post there instead of here. It's worth consideration