Steve Herman, of the Voice of America in Seoul, Korea, has said "this is getting quite serious".
Addendum: The picture to the right is being touted as the aftermath of the North Korean attack.
More as this chaotic situation unfolds.
Update: I have one report that the US has deployed a sub-launched Scan Eagle UAV to survey the damage.
Update: VOA reports that South Korea is mulling taking the incident straight to the UN.
Update: Report that PACOM has established two Combined Joint Task Forces, CJTF 71-1 and CJTF 72-1.
Update: I just got a message that says, "Things you should be Googling: USS JIMMY CARTER, Diego Garcia, Scan Eagle UAVs, SSGNs".