Gizmodo posted a short article reporting that Nextel's 2004 lineup includes a Windows Mobile powered smartphone made by Motorola, the i930.

"... PDA phone running Microsoft's Smartphone operating system that they're planning to release around the end of next year. The i930 will have a built-in digital camera with flash, a large 65,000 color display, an SDIO expansion card slot, and run on both the iDen and GSM cellular networks."

Still too early to know the real specs anyway - end of 2004!

Update: this device was confirmed for October 2005.