Well I do not know about usa, but motorola is american so there ought to be a a large market in usa for it as well as there is in Sweden. Our postal delivery guys makes use of mobile devices, as does lots of warehouse personnel, some stores in different degrees thou more are moving towards it. Also some insurance companies and the places that certifies your cars, (dmw in usa I think?). These areas I've experience in. There are probably a lot more of areas however.

One thing of note thou, big old companies are slow to move on to new tech. Some makes purchase but it's not common that they will on their own accord move on to mobile if they do not already have the competence in the company and there lots of companies are still lacking. But from what I know and see, it's very common with mobile business solutions in my country, thou I can't speak for yours.