Thanks to Treocentral, we found out that buried deep in Palm's website is Palm's affiliated software store website. That website has posted pictures of the Palm Treo 680 and the Palm Treo 750 with Cingular branding
This confirms the many rumors of the Palm Nitro and Lennon from many weeks ago. The 680 looks to be a Palm OS, low budget phone/PDA. Early reports are that it sports a low-res screen and possibly no Bluetooth.
The 750 looks to be identical to the 750v released by Vodaphone. Windows Mobile 5.0. Bluetooth, 240 x 240 - very much like the other 700 Treos but a little thinner with no stub antenna.