As Paul mentioned, as expected the Supreme Court will be hearing the case. Perhaps the most interesting thing is that the Court will be having a longer-than-usual argument about the severability issue alone. I think this should make clear that there is a very real chance that the Supreme Court will strike down at least part of the bill, and also that the possibility of striking down the whole bill is in play.
The stakes of this issue are huge — I believe you would have to go back to the New Deal to find a central part of the domestic agenda of a new President struck down so quickly. More thoughts on this tomorrow.
...typically valuable summary by Liptak.