Well the temperature sensor works! Its not pretty or calibrated (software) yet but measuring something is a lot more fun than beating my head against the wall. One I get the pH sensor tested I will put together something to pull all the information together and store it.
The GPS logger shield in the picture is working as well, but I still have a lot to learn on building the program I need to take measurements etc. The first step is to get the individual pieces working on their own with the Arduino, then start pushing things together to get a working prototype up and running.
To be completely honest, making something small and pretty will be hard given abilities, timelines, and funds...but it wouldn't be as fun if it wasn't a challenge :)