I programm this kind of apps all the time here in Ecuador for Banking, Insurance and Government agencies. I also teach Blackberry Programming in an IT Academy including from UI design and coding, Data services, GPS and multimedia, among other topics.
I can support your app all the time you need. My coding is clean, easy to read and well documented.
I also have a Blackberry Programming Blog, in spanish, because thats the language spoken here. Some of my blog post includes HTTP Data Services, Database connectivity, Web Services, Blackberry UI/UX, GPS and Maps, etc.
I love Blackberrys. (I would give you my PIN but thats against TOS)