There are a number of tools to help track how visitors are behaving on mobile commerce sites. Although many of these are still in their infancy (relative to their online counterparts) they provide invaluable data to help identify bottlenecks and usability issues. This is especially crucial given the limitations of the small smartphone screens and the differing operating systems.
Google have just recently launched real-time analytics which is great for tracking the success of promotions. The type of granular details these tools provide include the mobile operator and brand of mobile phone for each visitor! Once again it’s a case of applying the wisdom of “its not what you know but what you do with the data that matters”.