I have mixed feelings about the auction house. I'd love for it to work, but right now there are just too few eyes seeing what's for sale -- so some items that would sell easily on eBay won't get a bid at bitcoinhop.
If you have rare or unique items, it would probably be better to sell on ebay. But if you have computers or electronics then you will get a lot of bids.
Another problem is the instability of the value of a bitcoin. It's hard to put down a price knowing that the amount I'll receive in USD could be greater than or less than the value of the item I am selling.
That's because bitcoin is very new. Within a year or two, the value of 1 bitcoin will probably be more stable.
another point is that your site hold the coins another few days which prevent me for example on getting a less risky estimate of the value.
This is to prevent fraud. But once you sell a certain amount of items successfully, you can become a trusted seller and receive bitcoins right after the buyer pays.