On a recent edition of MacBreak Weekly (#71?), Scott Bourne spent time describing his vision for how the iPhone would be used in "push" style by retailers. He describes how a consumer might walk into Home Depot and get a store directory. I thought this to be a very insightful thought.
A recent posting at www.wdwmagic.com really drives this home. In the posting, they describe how Disney is now performing a similar function with the Nintendo DS device, and how they have forayed into this area in the past. [Click here for the wdwmagic.com forum discussions from users, or the full postings for Jan 9 and Jan 20 at this link.
These are excellent examples of how consumer-oriented companies can take advantage of portable technologies to expand and enhance the consumer experience while in their domain.