Someone took comparison shots of the upcoming HP iPaq hw5300 next to a Treo 650, which can give you some idea of size. It’s definitely bigger, which isn’t really a good thing, but it doesn’t have the external antenna, either, so it might perhaps be a bit more pocketable (and the screen is much bigger). Nevertheless, size is the one thing that non-smartphone users always mention when they explain why they don’t use a smartphone. At least it’s smaller than the older iPaq with the clip-on keyboard.
iPAQ hw6500 comparison photos appear on the web [DavesIpaq]