The Mobile Marketing Association (MMA) and its official research partner, Luth Research (www.luthresearch.com), today released highlights from the latest US Mobile Consumer Briefing, a monthly survey of U.S. adult consumers about their mobile marketing behaviors and opinions. Conducted in the aftermath of the devastating Haitian earthquake in January, the new survey shows that text messaging is now the second most common way that U.S. mobile users donate to charities such as those assisting in Haitian earthquake relief efforts.