Re: an Internet controlled robot
You will more than likely need a Wifi shield for the Arduino, and the specific coding/setup for it will vary from chip to chip. Here's a link to two major websites (Sparkfun and Adafruit) that carry many Arduino-specific shields and components.
Sparkfun: https://www.sparkfun.com/search/results ... ifi+shield
There are many, many more out there, and the best suggestion I can make is to do a bit of research, make sure you understand the project (plan out exactly what you want to do, what could prevent the robot from achieving those goals, and then start figuring which parts fit your goals), then start researching specific parts, prices, etc.
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