From what i've seen I don't think you should be thanking me.
joelb - you cannot provide proof of wall3ace agreeing to send via Express Post - you told me "it must have been via MSN". I've seen a copy of the PM's as provided by wall3ace and nowhere does it have that mentioned. You did not write up Express Post in your deal so really you have no comeback. You need to specify any terms of the agreement, including if you have agreed to an item being sent Express Post otherwise there is no recourse. What I did see from the PM's is that you were unnecessarily demanding, rude and pushy. I also saw that you requested positive feedback to be left on several occasions before the deal was even finished.
If you wanted Express Post, you must specify it to the seller, and also write it up on the Submit Sale & Trade Agreements thread. You cannot think the seller is a mind reader. Just because you wanted it quickly, doesn't excuse the PM's you sent.
As far as i'm concerned, wall3ace has done nothing wrong here and joelb's negative feedback is retaliatory (another no no on OzCards). wall3ace negative feedback is being removed.