I've also been searching around the 'Net for PalmOS programming resources that focus on using the PRC-Tools and have found very little. All the Palm app source code I've been able to find, with the shining exception of GNU Keyring, all assume you're using CodeWarrior on either a Win32 or Mac platform, which is apparently vastly different from using the PRC-Tools, not just because of the toolset differences - I don't even seem to have the proper includes/libraries to compile code written for CodeWarrior.
A quick scan of the various online booksellers also shows a dearth of well-accepted PalmOS programming reference books, (most have pretty poor reviews) and most of the summaries don't mention what toolchain they focus on, but I would bet they primarily focus on the CodeWarrior toolset.
Is anyone out there, other than the GNU Keyring project, using Linux as their primary development platform for PalmOS apps? How did you get familiar with the toolset? Where did you find code/API references? Should I really just set up a Win32 box and buy a copy of CodeWarrior for PalmOS or is it worth the effort of trying to get comfortable with the PRC-toolset? Or should I forget about writing in C and just learn FORTH?