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RE: Way out of proportion
It's not the only article. Realclimate.com has their own commentary with roughly the same conclusions.
The revised NASA data lives here and it links to a commentary by one of its authors. He, too, says that it's meaningless.
Here's a blogger who's tried to follow how this story's been covered. It's really popular among conservative global-warming deniers, who're claiming it's a Y2K bug (nope, it's not), that it completely undermines the global warming theory (nope, not at all), that NASA didn't acknowledge it until "forced" to do so (nope, they immediately sent an email thanking the guy who reported the anomaly and corrected the reports), and so on.
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RE: Way out of proportion
If I read the graphs on NASA's site correctly, the whole swing for the US since the late 1800s is about 2 degrees C. If some of the numbers were off .15 degrees, that's a 7.5% margin of error in 2 degrees.
The article you linked to is a bit ridiculous as well. The author complains that the US is only 1.8% of the planet, and the error should only sway the results by that much. I'm confident that there have been more accurate, consistent temperature readings in the US of the last 150 years than any other place in the world. I am also confident that there are many vast areas of this world that there have been NO historical data for until the advent of satellite temperature recording.
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