Obamacare customers shook off their Thanksgiving food comas last week and began signing up at a much quicker pace on HealthCare.gov, which has now sold 1.38 million insurance plans. The upsurge in enrollment comes in advance of next Monday's deadline to sign up for health insurance that goes into effect by Jan. 1, 2015. That federal Obamacare marketplace had 618,548 people pick an insurance plan from Nov. 29 through last Friday, the third week of the ongoing open enrollment season, according to data released Wednesday by federal officials.