From the Financial Times:

Last week was significant in that the dollar breached an important barrier, according to traders. Since May, it had been relatively stable within a euro trading range of $1.25-$1.30. Its fall outside this range left investors wondering whether that was simply due to a lack of liquidity around the Thanksgiving holiday or the start of a more sustained slide in the US currency...

An even bigger concern is growing talk of global central banks diversifying their foreign exchange reserves away from the US currency. One factor supporting the dollar has been huge purchases by foreign central banks. Since 2001, global currency reserves have soared from $2,000bn to $4,700bn according to the IMF, with two-thirds of the world's stockpiles held by six countries: China, Japan, Taiwan, South Korea, Russia and Singapore.

Anxieties over reserve diversification have been around for at least six months, with central banks in Russia, Switzerland, Italy and the United Arab Emirates announcing plans to cut the proportion of dollars held in their reserves. A shift by central banks away from dollars would remove a key source of financing for the US deficit...

Fan Gang, director of China's National Economic Research Institute and a member of China's monetary policy committee, saw things differently. He said the real problem the world faced was an overvalued dollar, not only against the renminbi but against all the leading currencies.

His comments come at a time when speculation is increasing that China, which is thought to hold 70 per cent of its foreign currency stockpile in dollars, is considering a fundamental change in its reserve allocation. These concerns were highlighted on Friday when Wu Xiaoling, deputy governor of the People's Bank of China, said Asian foreign exchange reserves were at risk from the dollar's fall.

And there is this (hyperlink added):

... Market expectations, monitored by the Federal Reserve Bank of Cleveland, show that investors think there is a 30 per cent chance of a cut in US rates in March.

Just as it seems interest rates in the US may have peaked, they are being increased by the European Central Bank, the Bank of England and the Bank of Japan. The ECB is expected to raise its main rate from 3.25 per cent to 3.5 per cent at its December 7 meeting. The big question is whether Jean-Claude Trichet, ECB president, will signal further increases in 2007.

Here's something to think about.  If the move away from the dollar is for real -- with the presumably inevitable result that current account deficits will not continue to support domestic spending in the United States -- the result will almost certainly be higher U.S. interest rates.  Here's a position, which I endorse, about what that might mean for monetary policy:

We believe that changes in the federal funds rate should be considered on the basis of where economic forces are taking market interest rates, a perspective stemming from several presumptions about the way our economy works. First, “a balance between the quantity of money demanded and the amount the central bank supplies” requires the federal funds rate to adjust roughly in alignment with changes in real—that is, inflation-adjusted—returns to capital.

In other words, if long-term real interest rates rise, monetary policy becomes more expansionary even if the federal funds rate doesn't change.  (This is roughly behind the idea of associating "easy" monetary policy with a steep yield curve, and "tight" policy with a flat yield curve.) That is worth keeping in mind as you read stories like this one:

In another volatile day on the currency markets, the dollar recovered some poise against the euro on Wednesday after an unexpectedly large upward revision to US growth 2.2 per cent in third quarter against an estimated 1.6 per cent and consensus forecasts of a 1.8 per cent rise...

Speaking in New York overnight, Mr Bernanke struck a hawkish tone on US interest rates, saying that inflation in the US remained “uncomfortably high”.

Analysts said that, while it might be something of a surprise that the dollar had failed to derive support from Mr Bernanke’s remarks, he might be in danger of “crying wolf” over US inflationary pressures.

You know, sometimes the wolf is really there.