We rely on research and testing to optimize the user experiences we build for our clients. Sometimes it’s big stuff, and sometimes it subtle stuff: What a difference a few pixels make (via CNET News) provides a great example of how granular these tests can be–and how much they can matter to the bottom line.
Mobile marketing (cell phones, not cars with billboards attached 
is probably the most exciting new frontier in direct marketing. With the cell phone being the most personal, the most context sensitive, and the most attended-to communications channel in the media landscape, it clearly represents a big opportunity to reach customers effectively.