According to a news post on Kotaku.com, Nexon's South Korean MapleStory Servers have been hacked, compromising more than 13 million subscriber accounts and their personal information. No other servers in other regions have been compromised, although this still constitutes an enormous database breach (Kotaku is reporting via Yonhap News that the number exceeds 13 million subscribers). The information was obviously encrypted and this dosn't really affect anyone in North America, but it serves as a good reminder to update those passwords.
Also, is it just me or does it seem like these compromises are getting more frequent? Better upgrade on internet security!