The keyboard, in particular, reflects the Centro influence. Though small, the keys have a plastic veneer that helps prevent fingers from sliding about. I did find the Palm's button layout confusing at times. I kept tapping the blank area below the screen's softkeys, which never produced a response. The Palm also got warm rather quickly.

Palm's home screen provided some welcome tweaks to Windows Mobile. Most notably, an icon in the upper right corner of the Today screen lets you view all running apps and shut down ones you don't need. This addresses an ongoing annoyance with Windows Mobile: It doesn't automatically clean up after itself, which can drain memory and slow the device down.

Palm provides a standard 3.5mm stereo headset jack and a reasonably good earbud headset. In my hands-on experience, the quality of audio and video playback was acceptable. The included 2-megapixel camera was adequate.

Palm preinstalls TeleNav navigation software, but to use it you must pay $10 a month. In my tests, it worked well, delivering good turn-by-turn voice guidance. The Treo Pro also includes GPS-assist software to help it get fixes faster, plus Google Maps, which can use GPS to show your location. Google Maps can create driving directions, but it doesn't provide turn-by-turn voice navigation.

The Treo Pro has plenty of pluses: Svelte good looks, bundled GPS software, a standard earphone jack, and easy Windows Mobile app shutdown. But the Treo Pro's heat issue worries me--and its high unlocked price tag could turn off anyone whose corporate IT department isn't buying.