Matt Harmon, Associate Professor of New Testament Studies at Grace Theological Seminary, sketches a brief biblical theology of work in light of Labor Day.
I've also been listening today to some sermons by Tullian Tchividjian on Gospel-Centered Relationships: Employee and Employer (Eph. 6:5-9).
Update: Here's a sermon by Lance Lewis on the topic, entitled Nine to Five.
As Steve points out in the comments section, Tim Keller has three free sermons on work:
1. Work
2. Made for Stewardship
3. Work and Rest
Also check out the info and audio at Redeemer's Center for Faith and Work.
John Piper wrote a chapter in Don't Waste Your Life (available online for free) entitled "Making Much of Christ from 8 to 5." It starts on p. 131.
