The BenQ P50 was mentioned several times on this site. It is a highly anticipated Windows Mobile Smartphone. In fact, it’s the only one that can challenge the Treo 650.
Think about it: No external antenna, comparable size, Windows Mobile, Wifi, Bluetooth, 1.3Megapixel Camera, SD/MMC slot.
It’s not even that expensive: Expansys has it for $449.95. The Treo 650 retails for $599, without a service contract.