Has anyone downloaded Mindwave yet? http://appshopper.com/link/mindwave It uses tones at certain frequencies to either make you sleep deeper, or be more aware, depending on what types of tones you listen to. This program has 10 presets and promises more monthly and is very reasonably priced. Has anyone checked this out yet? Anyone give it a try? Any reviews, I'm interested but would like the opinion of someone who already took the plunge. Thanks.