Mobile Help for BlackBerry, Windows Mobile, and Palm

[Stefanie Andersen]

I'm a technical writer for the mobile division of a CRM software
company. After rewriting all of the mobile documentation and converting
it from Word to XML (we use Arbortext Epic for XML authoring), I'm ready
to implement a help system for the mobile client application, which runs
on Windows Mobile, BlackBerry, and Palm operating systems. 
 
I'm in the investigation stage now, but I'm having a hard time finding
information about mobile help authoring in general and specifically
about mobile help for each OS. I've stumbled across a few articles about
Windows Mobile help, but even those seem to be scarce. If anyone can
point me in the direction of some resources, I'd appreciate it! 
 
Stefanie Andersen