For reference purposes, it may be handy to carry along a copy of the datasheet for the DS18B20 device.  You should be able to get one from Maxim at ‘http://datasheets.maxim-ic.com/en/ds/DS18B20.pdf’.

Wiring up the DS18B20 is simple.  I found pin configurations on page one of the datasheet and a wiring example on page six of the datasheet:

I tied the 1-Wire BUS line I/O line 9 on the Arduino.  The rest is programming now.

Reading ‘http://www.arduino.cc/playground/Learning/OneWire’ revealed that Jim Studt created a nice OneWire library for the Arduino that, thankfully, makes this whole thing a lot easier than I thought it would be.  It seems there are a few modifications by other authors that have been useful as well.