Forrester Research released its five year forecast that estimates interactive marketing spending from 2009 – 2014. Forrester predicts that interactive marketing in the US will near $55 billion and represent 21% of all marketing spend by 2014 and will include search marketing, display advertising, email marketing, social media, and mobile marketing. More significantly however, overall advertising in traditional media will continue to decline in favor of less expensive, more effective interactive tools and services. Forrester analyst Shar VanBoskirk alerts marketing…