What is mobile business intelligence?

Since you wrote this reply, we've seen the release of many new tablet form factor devices, hence there is perhaps a modification to your definition of Mobile BI to include tablets as well. It may seem obvious, but the impact of the form factor is ridiculously evident. I mean, when you see a tablet user, they are transfixed and most report that it has become the dominate device they use.
Also true is the rapidly emerging mobile BI application marketplace. Not only from the application perspective, but from the vendor perspective as well. Vendors need to be nimble and adapt to customer requirements quickly. Hence the need to have products that can react and change as well. The applications turned out by "mobility platform" solutions are often hard pressed to adapt in the face of changing customer requirements, especially if the client code takes longer than a day to revise and distribute. The result in the mobility market is the rise of the browser based applications and their ability to quickly be deployed and utilized to keep up with changing business requirements. (as well as fickle users, as Dresner reports)