Great looking, simple fly that promises to be light, easily floatable, and easy to tie. I will be tying up some of these to try them out this spring and I'm sure they'll work out. Check out the full step by step tutorial for tying two variations of this interesting fly on Passion for Fly Fishing.
Please note that the site is written in Spanish. My browser (Google Chrome), offers to translate the entire page and does a pretty good job, though if your browser doesn't offer this option, the efficient photography should really be all you need.