Just so nobody gets duped here. Premine's network was either attacked or a bug has caused more coins to be generated than the initial amount that exists. If you buy now you may be buying thin air.
There is a fix in the works and the blockchain will likely be forked before the event happened, which was thankfully quite recently. So we've only lost a day or so. Hold onto your coins, and leave your wallet closed until the fix is released.
ouch