UPDATE: I divided by 600,000 miles squared when it should have been 1,554,000 km squared. New date of entire gulf coverage with oil slick is October 3rd 2010.
END UPDATE

[link to www.csmonitor.com]

Officials combating the spill estimate that the oil slick has a circumference of about 600 miles (about 970 kilometers),...

April 28th the circumference was 970km. That equals approx 75,000 km^2 in surface area.

[link to www.csgnetwork.com]

On April 28th the oil slick area was 75,000 km^2.

That was 8 days after the event on April 20th 2010.

75,000 / 8 = 9,375 km^2

So it can be considered 9,375 km^2 a day.

The Gulf is about 1,554,000 km^2 in size.

1,554,000 / 9,375 = 166

It will take 166 days to cover the entire Gulf of Mexico.

166 days from April 20th 2010 is October 3rd 2010

Yup, 10-03-2010

That is still very bad!!!