Anthony Watts has some fascinating graphs of global temperatures posted on his excellent blog. According to the four major temperature metrics HadCRUT, NASA Giss, UAH and RSS, the global temperatures have plunged in January 2008. The temperature drop has been severe somewhere in the region of -0.588C and -0.75C. In other words almost 20 years of global warming was wiped out since January 2007!
See them for yourself.
Hadley Climate Research Unit (HadCRUT):
NASA Goddard Institute for Space Studies (GISS):
University of Alabama, Huntsville (UAH):
Remote Sensing Systems of Santa Rosa (RSS):