There is lots of hot air on both sides of this issue. I would particularly recommend DB's Rants, Kausfiles, and Charles Krauthammer's commentary today.
To me, the case for pulling the tube is increasingly shaky.
1. "Rule of Law" arguments carry no weight for me. I believe doing what is right is most important If the law leads to a morally wrong answer, the law should be changed. If it takes an emergency act of Congress, then that is what should be done.
If an alleged killer were about to be wrongly executed, and the state government and courts refused to intervene to right the injustice, would it be wrong for Congress to pass an emergency law to stop the execution?
2. Michael Schiavo is looking worse and worse. As James Taranto points out, he has clearly not fulfilled the typical role of a spouse, openly living with and having two children with another women. I think this is justified, but raises question about his motivations and right to act with authority of a spouse.
I would still want the tube out if it was me, but am increasingly uneasy that this is the correct decision in this case.