We are geeks. We don't need some grimy mechanic to plug a computer into our car to simply tell us our blinker fluid is low. Let's do it ourselves with the ScanGauge II. This device will easily plug into most cars and trucks made after 1996. It can read engine trouble codes, reset the check engine light, display more complex gauges (e.g., fuel economy, battery voltage, coolant temp, etc), display in multiple colors and will have an optional USB interface connection available later this summer for data logging and analysis purposes. The ScanGauge II is available for $170 over at ThinkGeek.