People being hacked since the last Server Check.

I read through Nexon's "venting" thread and at least two people reported that Nexon removed the feature that locks you out of your account after too many failed password attempts, allowing hackers to potentially brute-force people's passwords.

Assuming a 50 msec delay (which is quite optimistic I think) would make it possible to brute force a 6-symbol password in 582 years, so I have my doubts that this is the approach they're going for here. Dictionary attacks also seem out of the question. If anything, it's either a possibility to logon using some obscure vulnerability with the game (man in the middle in front of the server in front of a non-SSL'd transmission or some issue with login in the game itself) or a database leak of poorly secured passwords.