Jay reported yesterday that the Google Maps for mobile for Palm OS update would be available today. And sure enough, the updated app is now available.
My Location is compatible with Palm Centro smartphones running on the AT&T and Verizon Wireless networks. According to the Official Google Mobile Blog, if you have a Sprint Centro, you must first upgrade its operating system to Maintenance Release 1 for My Location to work. Palm Centro for Sprint will have the My Location feature available through a software update expected this summer.
Note that older Palm models such as the Treos don't have the APIs needed to get the cell tower data, so My Location is not available on these models. All Palm OS phones will be able to enjoy the other features of this release.
You can get the latest release of Google Maps for mobile here.