The FCC has posted a number of documents on the new HP Bluetooth Keyboard, including a 20 page user manual.
I just got these links so really haven't had time to read up on it and see if it will work with non-iPAQ devices, older Pocket PC 2002 iPAQs with bluetooth or anything else. Dig in though. There is plenty to read. You'll need Adobe Reader for most of the documents.
Keyboard open, top view. - The PDA rest is not extended in this image.