I've been loving the game so far and to be honest it been because I found a decent guild and trading near the Auction house is a blast. So keep doing what you're doing and I'll keep giving you a little money every now and then. Now I hope my suggestion are not too far flung but I'd really like to see some sort of in game guild bulletin board, Ideally something simple that is located with in the guild hall that we can post to to announce guild organized events and the like within the game. The message system is okay and all but a bulletin board just seems nice and it would be another reason to go to the guild hall.

As for trading I'd love to see user shops because while trading in front of the Auction house is fun and all it a bit too cumbersome to trade numerous items between players. That and while the auction House is a wonderful place to sell rare items, recipes and gear it a little too awkward for just getting rid of the more common monster material drops. The layout could be similar to the NPC shops, the selling player could set aside certain items in a "shop inventory", set prices and then find a nice corner of haven or the guild hall to "setup shop" this set up would effective make the player a NPC vender and allow buying player to click on the selling player in order to shop.