I threw this chart together based on a few numbers.
The blue line is the rate at which people have been signing up. I only have 4 numbers available though. There were 6 on day one, 248 by the end of day two, 27,000 for all of October and 50,000 by mid-November. Which is why you have the long lines - those are averages. The red line is how many people they need to sign up every day to hit the 5.6 million that CBO expeced Healthcare.gov to sign up by the end of March. Obviously they are way below where they need to be and will need to have several days above the red line to make it (or will need to have a lot of people sign up over the phone or through the insurance companies, etc...), but the trend is in the right direction.