Useful related information is posted on these sites:
Art in religious contexts
Art and Sacred Places
http://www.artandsacredplaces.org/
The Methodist Art Collection
http://www.methodist.org.uk/
Wallspace
http://www.wallspace.org.uk
Church conservation
Churches Conservation Trust
http://www.visitchurches.org.uk/
The Conservation Foundation — Parish Pumps
http://www.conservationfoundation.co.uk/
Church of England, Churchcare
http://www.churchcare.co.uk/index.php
Ecclesiastical Architects' & Surveyors Association
http://www.easanet.co.uk/
Friends of Friendless Churches
http://www.friendsoffriendlesschurches.org.uk
Educational organisations
Arts Centre Group
http://www.artscentrgroup.org.uk/
Chaplaincy to the Arts and Recreation
http://www.artschaplaincy.org.uk/
CIVA: Christians in the Visual Arts (US)
http://www.civa.org/
Chrysalis Seed Trust (NZ)
http://www.cs.org.nz/
ECVA: the Episcopal Church and the Visual Arts (US)
http://www.ecva.org/
Faith and the Arts
http://www.faithandthearts.com/
FAR, the Forum for Art and Religion
http://www.artandreligion.org.uk/
Fishfood Media
http://www.fishfoodmedia.com/
IFRAA: Interfaith Forum on Religion, Art and Architecture (US)
http://www.aia.org/ifraa_default
Royal Institute of British Architects
http://www.riba.org/
Guidelines for commissioning new art and architecture
Architecture Centre Network
http://www.architecturecentre.net/index.asp
The Architecture Foundation
http://www.architecturefoundation.org.uk/
Arts Admin
http://www.artsadmin.co.uk/
Arts Council mailings and information
http://www.artscouncil.org.uk/pressnews/mailinglists.php
The Church of England's guidelines
http://www.churchart.co.uk/
The Methodist Church's guidelines
http://www.methodist.org.uk/
Memorials by Artists
http://www.memorialartscharity.org.uk/
The Roman Catholic Church's guidelines (click on Patrimony)
http://www.catholic-ew.org.uk/liturgyframe.htm
Publications
The Arts in Religious and Theological Studies (US)
http://www.artsmag.org/
Church Building magazine
http://www.churchbuilding.co.uk/cb/
Faith and Form journal (US)
http://www.faithandform.com/
Image journal (US)
http://www.imagejournal.org/
Material Religion journal
http://www.bergpublishers.com/
Others
Modern Religious Art
http://www.modernreligiousart.com/