Yesterday, palmOne announced the Treo 650. Here’s a link to a video and an early review of the new device.
Looks like palmOne kept the form factor the same as the Treo 600. Some of the changes include:
320x320 high-res screen
Removable battery
Faster processor
Built-in MP3 player
Improved camera (mirror for self-portraits; captures video; works in low light)
Supports IMAP or POP email
Bluetooth