No, I haven’t messed up the numbers: there were models in the h5600. It’s just that they have been cancelled by HP (see for example this article).

There, however, are still floating devices around (see for example this eBay auction); I’ve also been offered one, which, being a die-hard gadget freak & collector, I'm really interested in. However, it just doesn’t see either the Wi-Fi, the BT or the phone unit at all – in Wireless Control, not even the icons of the first two show up as can be seen in here and enabling the phone results in a “a wireless radio must be attached to use the phone” message as can be seen in here.

The ROM version in the device I’ve been offered is 0.81.13 ENG, dated 08/13/02 (that is, pretty early, taken into account that it was only later that the first rumors on the h5600 series surfaced) as can be seen in here; the device has the GSM module, which has the version WGM_1310something as can be seen in here.

Therefore, if anyone has a h561x or a h565x, please PLEASE let me know :) I’d be REALLY grateful for any kind of help or information on this device. You’ll get LOADS of greetings and thanks in any “retro review”-kind of article I may publish on this rarity.

I’d really want to have this prototype as a working device in my huge collection of old PDA’s, but would not prefer paying big bucks for it if it is almost completely useless (currently, it is – it’s PPC2k2-based, which means almost no support for any recently released Pocket PC application or game and doesn't support any wireless either).

BTW, the device is legal, even if it’s just a beta one - also see the comments here.

(BTW, don’t be afraid: I’m OK, the reason for my not having published really big articles for a month is that I’ve had a lot of work and the current article I’ve been working on for three weeks also needed a LOT of work and research. However, I really think it was worth the time and effort – it’ll be THE definitive article on everything Pocket PC – to – desktop PC control and will contain a lot of not-just-Pocket-PC-related information on remote controlling issues in general. That is, it’ll be worth reading for anyone that is interested in remote desktop protocols in general, not only Pocket PC users.)

UPDATE: this AximSite thread is worth checking out ;)