Kwanzaa 2010 Dates & Calendar?

I heard that Kwanzaa is a holiday for African-Americans.
Do any white people celebrate Kwanzaa? What religion celebrates it?
When does Kwanzaa 2010 begins and ends? Where can I find the dates and calendar for Kwanzaa?
What percentage of African-American people celebrate it?
From what I understand, Kwanzaa was originally created as a replacement for Christmas and that the founder of Kwanzaa did not believe in Christ.

Kwanzaa is a week-long holiday honoring African culture and traditions. It falls between December 26 and January 1 each year in the calendar. Maulana Karenga, an African-American leader, proposed this observance and it was first celebrated between December 1966 and January 1967.

Derived from the Swahili phrase "matunda ya kwanza" which means "first fruits", Kwanzaa has its roots in the ancient African first-fruit harvest celebrations.

Kwanzaa is a seven day celebration of the values, principles and practices that have served African/African American people through the ages of our existence on the earth, all over the earth.

Most of the whites I know that celebrate Kwanzaa have black spouses or adopted black kids.
Some people criticize it because they read and believe all the garbage and crap they put on the internet about Kwanzza.

Kwanzaa is relatively new as it was first celebrated in 1966, and unlike the other two is secular and associated with no religion.