For two days at Forrester's invitation-only Forum For CMOs And CIOs in Napa Valley, California, over 100 CMOs and CIOs gathered to engage in conversations and working sessions about the roles each of them must play to build a customer-obsessed enterprise. Four companies in particular — HSN, Akamai Technologies, E-Trade, and The Weather Company — typify the ways that the CMO-CIO relationship can drive the transformation needed to instill customer obsession across the enterprise. This brief helps CMOs and CIOs apply these ideas to their own organizations, setting themselves up to build the joint business technology (BT) agenda needed to better win, serve, and retain customers.