rejesus is an English site with lots of articles that are useful for RE and is very much worth a regular look.
October 4 is the feast of St Francis of Assisi, patron of animals and of the ecological movement. These are four thought provoking poems about Francis while a Franciscan site provides an introduction to this immensely popular and lovable saint.
Speaking of ecological issues, have you seen this article in the UK Guardian. While it's a little dated (2007) it reports a new direction in attitudes to the issue of climate change within the Catholic Church?
The Catholic Social Teaching page with its summaries of major themes, notable quotes and Teacher's Toolbox is a great site. Another good Australian page is Principles of Catholic Social Teaching.
The new Dialogue Australasia Network page contains lots of reading for thoughtful RE teachers.