Universal Living Rosary Association: Saint Philomena - Quite a lot of information on St. Philomena, from a believers' perspective. The goals of the association are to promote devotion to the Immaculate Heart of Mary, and to honor St. Philomena. - http://www.philomena.org/ULRA/index1.html
Philomena - Also called Philumena or Philomene. Illustrated profile, with links. - http://www.catholic-forum.com/saints/saintp05.htm
Catholic Encyclopedia: St. Philomena - Skeptical article on St. Philomena, whose supposed relics were discovered at the beginning of the nineteenth century. - http://www.newadvent.org/cathen/12025b.htm