Hello all, I wasn't sure where else to post this.
I recently made a couple Arduino libraries for the Parallax Ping sensor and the Parallax PIR sensor, using the existing code from the Arduino Playground. I tested them myself and didn't find any problems. Here's hoping that people will find it easier to develop programs using these sensors using this cleaner approach. The libraries are on my repository (https://bitbucket.org/el_chino/arduinolibraries/src). If anyone runs into any problems, or has any questions, send me a PM (PMs go to my email).