With the upcoming launch of new Palm handhelds, I'd like to suggest you make them Mac ready. While Mac users make up are a smaller group, I would guess that if your products were more Mac friendly (not necessary to buy a separate MacPac) more of us would pick up a Palm brand vs a Handspring. Do you realize that there are over 20 millions macs out there? That's hardly a niche market and one that you shouldn't ignore or treat as second class citizens.
The Apple Newton was the genesis for PDA's and was probably ahead of it's time. One doesn't have to look too far to see the similarities between it (especially the 130 model) and the Palm V series. Both are simple, elegant and user friendly. All the traits that Mac users look for.