ABC has this report on the President's choice.
Here is a brief bio on Judge Samuel A. Alito.
The AP is running this story on Alito's background.
SCOTUS Blog has this bio and listing of his most important opinions.
As you will see from the above, many of the news stories focus on his dissenting opinion in Planned Parenthood v. Casey. Here is a link from Confirm Them to this dissenting opinion. Scroll down through the comments to get there.