Tutorial - site that has a video on using a kumihimo wheel. It also has links for other pages that allow you to design your own patterns and print your own kumihimo disk template (in a range of sizes and string numbers).
My MacGyvered marudai. An apple juice can, a clear CD, and some hot glue make up the marudai. I'm using a bunch of wooden clothes pins as tama, and a weight I'd picked up along the way acts as the counter balance.