While at EBay, Jeff Housenbold, now the CEO of Shutterfly, managed to enroll 65,000 new subscribers a day, and shepherded the company toward being the first to use Google’s Adwords. In the process, he took direct marketing online to a whole new level - day-parting and month-parting ads during traffic surges, targeting users by geography, and understanding ad buying strategy. In short, he cites new technologies as the key to solving marketing's oldest problems.