Year-over-year online sales growth was strong Christmas week (ended Dec. 25), up 33 percent, to $1.77 billion, from the $1.33 billion in the corresponding week a year earlier, reports Internet Retailer, citing comScore figures. Online sales were, however, down significantly from the record $3.03 billion the week before. Online travel sales for the week were up 28 percent, to $784 million, from $611 million in 2004.