Just before the new year, I noticed a copy of my book was listed on amazon.com for $160 (the listing price of the book is $60). A few days ago when I checked again, it was gone. Some poor guy or poor company paid more than double the original price of the book.
Today, two copies of the book were listed on Amazon, one for $250, and another for $260: http://www.amazon.com/gp/product/0130869856/.
So, if you happened to have the book and do not need it anymore, sell it. Just to reduce the crazy price.
For the moment, I'm talking to Prentice Hall PTR about re-printing it. Hopefully something can be worked out.