Very nice, short, article that compares the two rulings (one judges saying it's unconstitutional, the other saying that it's within the commerce powers of congress) and then goes on to describe the case that defines the power congress has to regulate commerce. It's this case that allows congress to regulate personal transactions if they determine that it is for the public good.
Judges Have Different Interpretations of Health-Care Law - WSJ.com
Both sides are going to take this to the supreme court, regardless of how the lower judges rule. The question is how will the supreme court rule:
A) Congress does not have the power to force people into a health care transaction
B) The public good is best served if everyone is forced into this transaction
I hope they set a high bar for "best served" because even if an eventual healthcare system requires payment into it, I don't think that this particular implementation is significantly better than our current system.