Update: This from a Palm's Spokesperson:
Palm has always been committed to open platforms for developers. And Palm has the added differentiation of being able to tightly integrate the software platform with our hardware design, which we believe gives us an advantage in delivering a great user experience.
Palm customers have benefited from the availability of Google services on Palm's platform, such as Google Maps for mobile on Palm OS. And we look forward to further collaboration with Google to offer great user experiences on Palm products.
...So the story will be that Palm's "special sauce" is more than just "UI enhancements" but also tight integration between the hardware and the software. That could indeed be important as both Android and the new PalmOS start to show up - the devil, as they say, is always in the details.