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The issue is the sensor board is wired backwards from the schematic in the code. Positive goes to the resistor and negative goes to the thermistor. I don't know enough about the code to figure out how to reverse that.
Your tutorial was perfect. At first I was skeptical it would be that easy. I was sweating over how to solder this FTDI chip to the Arduino board.Your steps were followed and it worked. I did have the first set of legs bridge in a couple of spots but some flux and solder wick solved that most quickly. The second set of legs worked as advertised.The only difference was on the second set of legs I dragged the tip of my iron across the very bottom of the legs right where they meet the pads.
Cheap AVR/51 Development board