SCOTUSblog covers the Court live here. Announcements begin at 10 ET.
ADDED: Here's a SCOTUSblog post clearly stating the issues in the remaining cases. That post is from last Wednesday, so it includes a few cases that were decided last Thursday. There are 6 more cases to be announced, but it's unlikely that all will be announced today, even though today is the last scheduled day for announcing opinions. There will probably be another day later this week.
UPDATE: "Montana campaign is summarily reversed, five to four." So... the occasion for reconsidering Citizens United is over. [Here's some background on the Montana case, where the state supreme court had a decision which did not give adequate respect to Citizens United.]
UPDATE 2: "The Court holds that the Eighth Amendment forbids a scheme of life in prison without possibility of parole for juveniles." A 5-4 decision, written by Justice Kagan. Justice Alito writes the dissenting opinion. "[I]t is relatively rare for a Justice to read a dissent from the bench but not unheard of."
UPDATE 3: The 9th Circuit is reversed in part and affirmed in part in Arizona v. United States. "Most of the key provisions of SB1070 (3 of 4) are invalidated. One provision is held not to be proved preempted; it must be construed.... The provision that the Court says is not yet preempted is the 'check your papers' provision that commands officers to check immigration status."