hmm, one wire? they'd have to have two to actually do anything, and then they'd be thermistors, in which case they'd be variable resistors.
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measure their resistance at room temperature.
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find a fixed resistor with that measured value (or something near it)
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connect one between VCC and an analog-in on the Arduino
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connect the fixed resistor between analog-in and ground.
This makes a voltage divider based on the value of your thermistor, and the numbers from reading the analog in will have a linear relationship to temperature. you just have to find out what that relationship is and write a function to translate. I keep everything integer in my thermistor readings to keep things simple. Thus 989 means 98.9 degrees Fahrenheit, etc.