At the global headquarters of eHarmony in Pasadena, Calif., one blue wall is papered with testimonies of love: snapshots of couples who met on the Internet matchmaking site and subsequently got hitched. There are older couples, military couples, kissing couples, couples with physical disabilities, couples dressed in wedding whites. Soon, if all goes as planned, there will be Chinese couples, Indian couples, European couples, many dressed in the brilliant matrimonial hues of their cultures. They're going to need a new wall.
Once a practice as provincial as it was personal, the art of pairing up people for marriage has become an...