Wow - this thread got a lot of posts!
I am doing an
experiment trying out the LOA (The Secret).
My opinion is that the effect is psychological. Meaning, if I concentrate and focus on something long enough, my sub-conscious and conscious mind will work to create the reality. I'm not sure about the whole "sending vibrations to the Universe" thing. Maybe that's it. Who knows.
Either way, I'm giving it a try.