Getting started with microcontrollers?

I want to start microcontroller projects and I need to know what materials I need. I already have a five volt power supply. I want to buy this http://www.sparkfun.com/commerce/product_info.php?products_id=8 but I am not sure if that is what I am looking for. In summation, is a microcontroller a chip that is... show more I want to start microcontroller projects and I need to know what materials I need.
I already have a five volt power supply.
I want to buy this http://www.sparkfun.com/commerce/product_info.php?products_id=8 but I am not sure if that is what I am looking for.

In summation, is a microcontroller a chip that is programmed by pc and placed on a circuit board to direct current?

Does it look like this---

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Update: I'm not entirely new with electronics, I have a basic understanding (transistors, caps, transformers, etc..) and I know how to write Java and Basic computer programs. Are there any books you can reccomend?
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