Oh and this probably isn't the right subject, but I really don't get how to use my Parallax Ping sensor. I know how to connect it to the arduino, but I don't know how to set it up in the code and how to set the values and stuff like that. Is there any example? I went to your blog, MeanPC, and it was pretty cool, but I still didn't get how to set the code. Lol. 
One more thing. I tested my motors, and even though they say 1.5-3V on the packet, it doesn't run in my 3V pin on the Arduino. It works great in the 5V pin though. So what is going on here? Thanks.