From Barack's own website, here is his speech, given July 22, 2007.
I have a universal health care plan that will cover every American and cut the cost of a typical family's premiums by up to $2500 a year. It's a plan that lets the uninsured buy insurance that's similar to the kind members of Congress give themselves. If you can't afford that, you'll get a subsidy to pay for it. And it goes further than any other proposed plan in cutting the cost of health care by investing in technology and preventive care, breaking the stranglehold the drug and insurance industries have on the health care market, and helping business and families shoulder the cost of the most expensive conditions so that an illness doesn't lead to a bankruptcy. And I promise you this - I will sign this universal health care plan by the end of my first term in office as your President. Count on it.