The first day Crescent of Ramadan 1433/2012, we couldn't see it

For the last twelve days we could not sight the moon becaouse of heavy clouds, but we were expecting the month of Shaban to end at 29, which is on Thursday 19 of July 2012, and that makes first day of Ramadan to be on Friday 20th of July. even last night we tried to drive out side of Nairobi some 200 km just to see if we could sight the second day Crescent we couldn't due to the clouds. but we heard it has been sighted from different location in Kenya, and we do have those who follow Saudi Arabia, some are starting the Ramadan today on Saturday.