A kind of progress
By Assuming Sotomayor is confirmed, the SCOTUS is going to have only one Protestant justice, along with six Catholics and two Jews. (And Stevens appears to be the most nominal of Protestants, as he doesn’t list himself as a member of any particular denomination).
Given that for most of American history the conventional wisdom was that the Court had room for one Catholic and one Jewish seat at any particular time, this is in some ways an even bigger shift than letting girls into the club.
What’s next, a black Muslim president?