Scruples.net
Scruples features blogs and faith at work online communities for dialogue on topics related to faith and work.
URL: http://www.scruples.net

Marketplace Leaders
Marketplace Leaders exists to help men and women discover and fulfill God's complete purposes for them in their lives and work.
URL: http://www.marketplaceleaders.org/

Ministry in Daily Life
Ministry in Daily Life is a ministry of InterVarsity Christian Fellowship and features many helpful articles including the entire article database of the Word in Life Study Bible with more than 500 articles on faith and work.
URL: http://www.ivmdl.org/wil.cfm?study=134

Christianity 9 to 5
This website is provided by Regent University and has a wonderful article section that features complete chapters from popular faith at work books.
URL: http://www.christianity9to5.org/articles.cfm

International Coalition of Workplace Ministries (ICWM)
This organization serves leaders and ministries in the faith at work movement.
URL: http://www.icwm.net/articles.asp?columnid=604