Partnering with interactive agency Acxiom Digital since 2005, Sephora has developed its Beauty Insider loyalty program from the ground up. Tiffany Lei, marketing director at Sephora, and Tim Suther, SVP of digital marketing services at Acxiom, recently took part in a conference call with DMNews' Mary Elizabeth Hurn to discuss the successful partnership and the challenges of bringing in-store experiences to the Web.