I am a big proponent of delivering visualizations of complex data on mobile devices. Why not have it on hand where you need it? Likely fully armed with data about where you are? Think of the tough tasks of someone analyzing the profitability of a store shelf.
ESRI has come out with a free IPhone app BAO (Business Analyst Online) that addresses this general problem. Reported in CWorld and also more in ESRI's site. Available in the IPhone App store now, will look at it closely and report back. Visualizing complex data about locations available where you are. At this time it includes US data only.
" ... BAO for iOSWith the free BAO for iOS application, you will be able to perform site screening in the field on your iPhone, iPad, and iPod touch.
Visiting a potential new site? BAO for iOS gives you the demographic and market information you need to instantly evaluate the area on-site ... "