Chris Hayes calls this the "Most important piece of polling data I've seen in months." I don't know if I'd go that far, but politically it's pretty important. What it shows is about what you'd expect: opposition to healthcare reform comes overwhelmingly from people who would never consider voting for a Democrat in the first place. Among that group, opposition to HCR is 94%-1%, and obviously no Democrat risks losing any of their votes by passing healthcare reform.
But among those in the middle, those who might vote for a Democrat but aren't sure bets, support is about evenly split. These people are obviously persuadable, but they're only persuadable if Dems actually pass healthcare reform first and then campaign on it as if they actually believed in it. This is still a winnable campaign issue. Full poll results here.