According to Sascha Segan, you can add the HP iPAQ hw6925 to the long list of YAQKWMS that tries very hard to do it all and ends up not quite doing anything well (Motorola Q, I'm looking at you). Its killer feature, as far as I'm concerned, is integrated GPS. That's "killer" as in "awesome" and as in "kills battery life." The 240x240 screen doesn't bother me too much, but then I'm used to it.
The new HP iPAQ hw6925 tries to be the ultimate traveling companion, bringing together an unusually flexible GPS system, phone, and PDA in one easily pocketable unit. But its small, low-res screen and below-average battery life make it less useful than it could be.