Wow! I found something really cool that is all about helping to answer this question of the illusion of being separate from each other. It's a guided "awakening experience" to help us realize we are all one. Steve mentioned it in one of his posts I saw today.
It's a print book called "Lucid Living" but I got the audio version read by the author... 45 minutes and it's only $2.95 at iTunes. Worth investigating: iTunes Store--Lucid Living
That's the US iTunes store... I actually got it at audible.com though.
Really excited about this.