I've tried a few binarual beat CD's. I started out with the Hemi Sync Meditation CD. I've went into two dreams from a waking state with this one so far, WILD's. Unfortunately both were extremely short because in the first one I was going towards a stack of boxes as I entered the dream and in the second one I tripped on a uneven part of a side walk just after entering the dream, and woke up. I've also seen flashes of light while listening to this CD. If I listen at bedtime I will usually fall asleep. I've not yet tried looping it though.
I also just recieved yesterday two CD's from Brainwave Mind Voyages, The Lucid Dream Cycle CD, and the Astral Trance CD. The Lucid Dream Cycle CD has 4 tracks. You are supposed to pick the one you like and loop it all night. I listened for a while last night, not looping. I saw some flashes of extremely bright white light at the bottom of my field of vision, not sure what the light is. But I was having difficulty falling asleep so I stopped listening, will try again.
I tried the Astral Trance CD this morning straight through, it is over an hour long. It has some tracks that are designed to be looped as you sleep. It is verbally guided and has a good relaxation part of the CD that I believe put me into sleep paralaysis but I came out of it during the part where you are actually suppossed to leave your body. When the CD was over I felt very relaxed, so I beleive these can work.
I'm sure there are many more good binarual beats out there.