I am anticipating

A bunch of people will be going on a moon sighting trip tomorrow (Friday) after sunset. Of course, they would not see the moon. Coming back home, they would confidently assert that since the new crescent was not visible, so the Eid should be on Sunday (08/19).

As you can see from the moon sighting maps (shown below) the crescent is not going to be visible either on Friday or Saturday for most of the world. It will only be visible on Sunday. The earliest day for moon-sighting would be Saturday. And on Saturday, the moon would not be visible at all, which mean the Eid is technically on Monday 08/20/12.

Friday -- To Early to See the Moon

Saturday - The new moon would not be visible

Sunday - Moon would be visible for everyone