We have crossed the threshold

http://www.usdebtclock.org/

$16,408,000,000,000

I like this the best though:

The temporary moves would create $200 billion in “headroom,” according to Geithner. Under normal circumstances, that amount of headroom would last approximately two months.
However, it was unclear how long such measures would last, because tax and spending policies for 2013 are still under negotiation as part of the talks to avert the fiscal cliff, he said.