It's down for a security patch, I believe. So, it'll be down as long as that takes.
Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.
~Ralph Waldo Emerson
"I was just the one with the most unsolicited sombrero." - Traegus
That wasn't vague at all... 
I can get into the store from my character screen. Are you sure it isn't the NC Master security thing? That just locked me out of one of my accounts.
SAVE CoX info:
Titan Network efforts
Saving CoX events/FB info
http://us.ncsoft.com/maint.html
Any idea how long this is going to last?
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I just went to buy Going Rogue, and I got this message.