If Judge Alito is confirmed to the Supreme Court, a majority of the justices will be Catholic: Scalia, Thomas, Kennedy (boo), Roberts and Alito. Benedict (not the Pope) blogs the "Top Ten Changes a Catholic Majority Would Make to the Supreme Court."
Here's my favorite:
8) The bones of Chief Justice Marshall will be disinterred and placed in a glass coffin in the center of the Supreme Court bench;
Go read the whole thing.

Justice Thomas is Episcopalian
Hmm... I've heard and read it reported widely that Thomas converted (maybe reverted?) to Catholicism since becoming a SC justice.