What's in a name?

Nick Gillespie points to the most popular baby names of 2007, compared to 1950. Two interesting things:

1) The long tail: the 10 most popular baby names now account for only a tenth of the babies born in the US, rather than a quarter

2) The return to the bible: More than half of the names are biblical, most from the Old Testament. Is America getting religion? Or have we gotten so irreligious that "Ethan" sounds vaguely exotic?