Best of the ADF Website:
READING LIST: http://www.adf.org/training/reading.html
THE DRUID COSMOLOGY: http://www.adf.org/articles/cosmology/worlds-kindreds.html
THE CORE OF DRUID LITURGY: http://www.adf.org/articles/cosmology/core-cult.html
MAGICAL SKILLS IN DRUID RITUALS: http://www.adf.org/rituals/explanations/magskills.html
ADF DRUID RITUAL LINKS: http://www.adf.org/rituals/
The Intentions of Drudic Ritual: http://www.adf.org/rituals/explanations/intentions.html
ADF FOUNDER, ISAAC BONEWITS, ARTICLES ON DRUID LITURGY...
Somewhat older material but these are the some of the best writings on public Neopagan Liturgy ever written down. Cassette tape-sets of Isaac's lively presentations of this material are available from the ADF Regalia center and from ACE, the producers of the annual Starwood Festival. http://www.adf.org/rituals/explanations/basicpr.html
GOOD BEGINNER ADF LITURGY OUTLINE: http://www.adf.org/rituals/explanations/brief-lit.html
Other HIGHLY RECOMMENDED SITES:
OBOD The Order of Bards, Ovates and Druids: http://www.druidry.org/
Britain's best and largest Druid organization offers a wonderful array of resources on their site as well as a highly regarded study program that is at once scholarly and experiential in nature (basically a correspondence course). - Many American ADF members are also members of this venerable British organization and have taken their course.
ANGLO SAXON friends and resources in the Pittsburgh area...