I am a bit concerned by the ammount of missinformation and strange things I see due to the recent MTG leak.
If you follow the comments on their website and the posts in the forum you might also notice alot of people urging to sudden action. Especially I noticed ever changing somewhat-serious sounding names writing varying-detailed posts from 'skrew mtg, going over to TradeHill' to longer ones, explaining the bonus you get from the coupon.
Please inform yourself before you do anything. Especially be careful with new markets where you trust your money in. Concerning TradeHill, eventually check their personal data. They have made a really serious looking post here: http://forum.bitcoin.org/index.php?topic=19537.0
(copy of it here: http://pastebin.com/5ZwZayPp
Not sure if it is from fanboys actually trying to help TradeHill or if there is only their own advertismentdeparment behind this, but things look really suspicous to me. I would not trust my money to them. But decide for yourself... think for yoruself, think before you act!