Ordenar Colecciones

http://xyzdev.blogspot.com/2009/01/ordenar-listas-en-java.html
http://groups.google.com/group/eticom-master-java/web/colecciones-de-objetos
http://java.sun.com/j2se/1.4.2/docs/api/java/util/Comparator.html
http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Comparable.html