Also, this is new:
Trading is halted until 2013-04-12 02:00am UTC to allow the market to cooldown following the drop in price. Read more details on the support. Additionally trading fees will not be charged within 48 hours of trading resuming (until 2013-04-14 02:00am UTC).
Just so you know, even MtGox has issues. At the current rate, I'm about 2 days away from being verified on there, and probably going with them for my initial buy-in (simply because they actually seem to know what they're doing in spite of their ineptitude in carrying it out). It's a young market. It will recover.
But I'm chomping at the bit to buy, LOL.