I have not seen Palm release major application features in their revisions to their operating system which is now up to version 3.5. This release was the consolidation of 3.1 through 3.3 which added support for web clipping and secondary storage and added color support. During the past year, Handspring and Sony have released their Palm OS based devices. Their decision to support radically different storage options fragments the marketplace. Rather than leveraging the existing PC Card, CompactFlash, or MultiMedia Card formats, Handspring has chosen to create it's own standard called Springboard modules.
Springboard modules are still overpriced compared to the marketplace.
Sony did not make the situation any better. Their decision to support their Memory Stick in the Clie continues this trend towards the inability to share information between Palm OS devices. I have used a Palm IIIc and it suffers from performance limitations such as waiting noticeably write to the screen. I think this performance drag is due to the lack of power that the Motorola Dragonball CPU offers at a blazing 20 mhz. This CPU speed is the same as the Palm Vx as well which performs much faster with it's black and white screen.