Online ad firm Rubicon Project has hired a new president and COO/CFO, in what some believe may be in preparation for an IPO. Greg Raifman, previously the founder, chairman, and CEO of Dragon Media, will take on the role of president. Ex CEO of SocialVibe Todd Tappin will be taking over as COO/CFO. “Both Greg and Todd have great relationships within our industry as well as on Wall Street. Their presence will enable me to focus on our overall vision and product strategy so we can take best advantage of the opportunities we see,” said CEO and co-founder Frank Addante. [Source: AllThingsD]