This sounds very amazing; all the world being united in thoughts of peace, love, and harmony for an hour. I definitely plan on being a part of this.
So, at 4:11am on July 17th, I will be doing my best to meditate and concentrate my hardest on the best times in my life. Not only do I believe it will do the karma of the world some good, it may do me some good to actually remind myself that I have had some good times in my life and it's not all crappy like I think it is. Sure, recently I haven't been feeling too great... but that isn't my whole life.
If you can't tell, I'm really excited for this idea. I hope you all will get involved. :)