The HP is an awesome device, but I think it's only available in the UK. I plan to get one as soon as I can get enough money to have one shipped here, it's built-in got GPS, GSM/GPRS/EDGE cell service, and Bluetooth.
I plan to get the one without the camera, as camera phones aren't allowed in some places nowadays, like the gym I go to, and I hate people staring at me when I use a cameraphone/camera-pda, as they think I'm trying to take their picture.