A couple of my colleagues have given talks on healthcare.gov from the perspective of the engineers who worked around the clock to help get the site running again: http://youtu.be/0albm_hhQzM?t=3m40s http://www.youtube.com/watch?v=GLQyj-kBRdo
A small team is also re-writing the site, starting with the most troublesome components for the next open enrollment period. Wired covered some of what is going on here: http://www.wired.com/2014/06/healthcare-gov-revamp/
If any of you out there want to help, please email jobs@hcgov.us!