I have been interested in wearable computing for a while. Until the RaspberryPi was released, there was no affordable and compact option for the computer part of a wearable computer. My original setup used a laptop in a backpack, but that is a little too big to be practical. I have seen a lot of arduino based wearable electronics, but they are not exactly what I have been looking for - a full power desktop computer that you can carry around at your side and use while walking, standing, sitting, or doing anything else.
As a linux guy for many years, the RaspberryPi is the perfect solution to my problem, and I'm already comfortable with the OS. Before you begin, make sure you read through my instructions. I have updated several sections through the past few months.
Just so you guys know, this is my first instructable after being a lurker here for almost seven years. I'm excited. So, let's begin!
Update March 2013: I am now using a new (3D printed!) case. Significant updates to the battery pack made as well. The new case prevents the Pi from being totally enclosed, and marginally decreases the form factor.
Update September 2013: Added a new video demonstration. Check it out!