What is jailbreaking?
Really, it removes certain restrictions embedded in your device, allowing you to add applications from 3rd party sources that don't have to go through the Apple store. In other words, it gives you access to tons of free themes, applications, and methods of customization, all for free.
My step-by-step guide makes it super easy. You won't find a guide like this anywhere. I spent countless hours trying to figure out the various "how-to" guides on the internet, but they were all very confusing when it came to jailbreaking the 3.0 firmware.
I finally figured it out, and when I did, I wrote up this guide to save you the trouble.