When Will the USD Carry Trade Finish Unwinding?

Back in Oct 08, I speculated that USD had become a major carry-trade currency, along with JPY. Bad news for US economy made USD stronger, much like what had been happening to JPY for the past few years. That was a dramatic reversal against the usual carry-trade target currencies such as AUD and CHF (Swiss Franc), and to a somewhat lesser degree EUR and GBP, since early 06. FX rates are one of the most complex dynamics in the complex dynamics of financial world. But when bad news is good news for a currency, it's a sure sign of it being a pivotal carry-trade currency.

Recently, and especially today, we're seeing another proof of USD and JPY being the carry-trade currencies. It's implausible to argue the recent USD strength has anything to do with safety or even risk aversion, the latter being the usual explanation for carry-trade currency strength. It's more like forced, maybe even panicking, unwind of existing carry trades.

Hence lies the surprise to me as a casual observer of the FX market: what, there's still a massive amount of carry trades open, a year and half after the crisis blew up in the US and half a year after the crisis became an exported, global one?

But the more interesting question is this: when will this unwinding finish and bad news for US economy becomes bad news for USD? That would mark the next turning point in the dynamics for USD and JPY.

I would appreciate readers' enlightenment as to how to find data, or even if just a guesstimate, on the scope of carry trades.