Christianity Today has published an article written by Craig Keener, Larry Osbourne and Mark Driscoll. It's called "An Army of Ones: Does Diversity in the Church Work?" It's an interesting article with three sections each by a different author, and then responses by the other two.
Craig Keener is a white minister in a predominantly African American congregation.
Larry Osborne pastors North Coast Church—a ministry that pioneered the use of "video venues" to create multiple congregations distinguished by worship style within a single church.
Mark Driscoll is pastor of Mars Hill Church, a community birthed from a postmodern context now wrestling with issues of diversity as it matures.