@ehBeth,
Well we were focusing on opinion of healthcare reform, but yes, the President's overall approval rating has also been sinking in all polls. Rasmussen, using likely voters only, has him at the lowest. Quinnipac gives him barely better ratings in a recent poll.
But most think the reason Obama is losing ground in overall approval ratings is mostly based on the controversial healthcare reform issue. If the Senate decides to pick up the Cap and Trade issue again though, you can look for the President's approval ratings to tank even further because Americans are realizing that they can make a difference by demanding to be heard.
If the President would back off the more ridiculous healthcare rebuilding scheme and go to something to improve the existing system in ways that most of us can agree with, and if he put Cap and Trade on the back burner, you would see his approval ratings zoom back into the 60 percentile range in no time at all.