For minute-by-minute coverage, it's hard to beat SCOTUS blog's live-blog of the healthcare decision. For a Republican perspective, Avik Roy's live-blog over at NRO's healthcare blog is worth a read. And the Beast is providing live video reaction here. Jonathan Cohn has a primer on what to expect:
The Supreme Court convenes at 10 a.m. The justices have two other decisions to deliver, so they might not get to the health care case until 10:15 or so. Even then, the ruling and its effects may not be immediately clear. The Court must effectively address four separate questions and the justices may write multiple decisions.