Google has announced the official availability of Google Maps for Mobile on Palm Treo devices. This was a device that was previously not supported by Maps for Mobile and was very highly requested by users according to this post on the Google Blog. The post notes that there are two ways for Treo users to download Google Maps for Mobile: "..Visit google.com/gmm on your Treo's web browser, or you if you prefer, download and HotSync® here."
Google Blog: Maps in the Palm in your hand
Google Mobile Maps: Treo Page
Palm.com - Treo 650
Google Maps for Mobile now supports (Google Earth) KML
Google Maps for Mobile now includes live traffic for US cities