Yours truly is covering the White House press conference, over on Twitter.
For more detailed discussion of the nomination of Judge Sonia Sotomayor to serve on the U.S. Supreme Court, see our prior post.
Earlier: Breaking: Obama To Nominate Judge Sonia Sotomayor (2d Cir.) to Supreme Court

As we once wrote about Judge Sonia Sotomayor of the Second Circuit, paraphrasing the lyrics of another high-powered Latina who made it from the South Bronx to the pinnacle of fabulosity and fame, “Don’t be fooled by the robes that she’s got; she’s still Sonia from the block.” Despite her high station as a federal appeals court judge, the down-to-earth Sotomayor has her clerks over to her apartment, for card games and drinks.
It now looks like “Sonia from the Block” might be taking up residence on a new block — One First Street, in Washington. From The Caucus:

President Obama has chosen Judge Sonia Sotomayor of the Federal Appeals Court as his nominee for the Supreme Court, officials said on Tuesday, and has scheduled an announcement for 10:15 a.m. at the White House.

Ms. Sotomayor, 54, will be the first Hispanic to serve on the Supreme Court if her nomination is approved by the Senate.

The president reached his decision over the long Memorial Day weekend, aides said, but it was not disclosed until Tuesday morning when he informed his advisers of his choice less than three hours before the announcement was scheduled to take place.

The president narrowed his list to four, according to people close to the selection process, including Federal Appeals Judge Diane P. Wood of Chicago, Homeland Security Secretary Janet Napolitano and Solicitor General Elena Kagan.

Congratulations to Judge Sotomayor. She will be a tough nominee for Republicans to defeat, due to her compelling personal story. To read about that story — which took her from the housing projects of the South Bronx to Princeton, Yale Law School, the legendary New York D.A.’s office, private practice, the S.D.N.Y. trial bench, and the Second Circuit — see the New York Times profile or her Wikipedia entry. It also won’t hurt her confirmation prospects that she (1) would be the first Hispanic justice and (2) was appointed to the district court by the first President Bush (even though she was really the pick of Senator Daniel Patrick Moynihan, not the Bush White House).
Will SS thank Jeffrey Rosen in her nomination acceptance speech? Professor Rosen, with his attack piece on her, sparked a backlash — in the blogosphere, from Latinos, and in liberal circles more generally — that may have helped her nomination in the end.
There’s extensive discussion of the Sotomayor nomination over at SCOTUSblog, where Tom Goldstein was analyzing the nomination dynamics as early as 7:30 this morning. Goldstein is of the view that her confirmation is almost certain, absent any major surprises, and we tend to agree. The potential roadblocks — her involvement in the controversial Ricci v. DeStefano affirmative action case, her unfortunate quip about courts making policy — just aren’t big enough to stop her (and her history-making nomination).
(According to SCOTUSblog, the AP publicly reported the news of her nomination first. But in this day and age, in which news spreads almost instantaneously, scoops tend not to last for longer than a few minutes.)
This should be an interesting confirmation. Stay tuned.
Obama Chooses Sotomayor for Supreme Court Nominee [The Caucus / New York Times]
The Dynamic of the Nomination of Sonia Sotomayor [SCOTUSblog]
Sonia Sotomayor [Wikipedia]
On a Supreme Court Prospect’s Résumé: ‘Baseball Savior’ [New York Times]