Mobile marketing

The Mobile Marketing Association is a great resource when you're looking for information or data on the mobile phone market -- consumer usage, advertising practices, mobile gaming, search trends, etc. While some information is for members only, there are reports available for free in full or abbreviated formats. For example, under "Resources", the "Mobile Advertising Overview" is a 20-page report that looks at best practices and opportunities in mobile advertising. News releases, case studies, and summary data from Nielsen and NPD Group are also available. MMA publishes the IJMM International Journal of Mobile Marketing, a peer-reviewed bi-annual journal.