I have collected some statistics on the given names in my Roper, Franklin and Little files.
Some interesting results about the frequencies of given names are in the files below.

When's It a Name (A study of given-name frequencies in my Roper file.)
(MS Word file: Zipped: 0.527 Mb/Unzipped: 23.3 Mb)

Sample name frequencies graphs

Popular names in Roper file

Also, I created a file of given-name frequencies in the Bible:
Name frequencies in the Bible