Black Friday saw $648 million in online sales, making it the heaviest online spending day to date in 2010 and representing a 9 percent increase over Black Friday 2009, according to the latest report from comScore. U.S. ecommerce spending for the first 26 days of the November-December 2010 holiday season reached $11.64 billion, marking a 13 percent increase over the same period last year. Thanksgiving Day (November 26) saw online holiday spending up 28 percent to $407 million.