a hipper hippie

Back in January I found a post on Shabdi's designs on Ready Made Blog and the images are absolutely stunning. Sadly, I can't pay $100 for a tshirt. Over Earth Day I ended up dieing a tank top but it came out more stereotypically hippie while I wanted the soft colors and empty spaces of the first photos. I also love the bottom two images that are more vibrant. How would I achieve these effects? A commenter on Ready Made Blog mentioned Shibori, which I looked up on Wikipedia. I'd like to learn more about techniques for dieing. Anyone know of resources?