Worshiping Jesus in the Mosque
Christianity Today looks at muslim background believers who stay within their Islamic culture while affirming that Jesus is Lord.
UPDATE:
A critique of the Insider Movement approach and a response.
This month's Evangelical Missions Quarterly examines the issue. Subscription required.
Two books on the question of Insider Movements and syncretism.
"A Theological Analysis of the Insider Movement Paradigm from Four Perspectives: Theology of Religions, Revelation, Soteriology and Ecclesiology" (Doug Coleman)