Yes, it does exist (like the iPaq 6310 although it doesn't have an integrated camera when sold in Europe, only in the US)
http://www.bargainpda.com/default.asp?newsID=2208&review=HP+iPaq+6315, but usually the compromise on at least ONE of these components is unbearable, so I would strongly discourage the all-in-one route. Especially on a motorcycle, you want at least the music source to be separate, so that it can be interrupted when GPS voice instructions/phone calls comes in (and not get a muddled phone-gps-music all at one, trying to fiddle with small buttons at 90 mph on the motorway...).
Here is what I've got:
- An iPod 40Gb for the music (with the great freeware eupod volumeboost
http://espen.se/index.php?subaction...789276&archive=&start_from=&ucat=1&category=1 to be able to hear something!), in tankbag
- An iPaq HX4700 (VGA screen, really good for PDA, viewing films, occasionally listen to a few MP3 albums when not on the bike) in a waterproof Otterbox with a RAM mount
http://www.otterbox.com/ (which allows me to use only the GPS when it's raining, withou the tankbag). A cheaper PDA can do fine, although you have to be careful, most PDA screens are not readable outdoors in the sunlight (I previously had an iPaq 2210 and that point was awful). I use TomTom Navigator 3 as my GPS software.
- A bluetooth GPS (Royaltek BT-1000, small, reliable) either in my pocket for short trips or connected to power in my tankbag on long journeys
- A sony Ericsson T630 (bluetooth) for phone calls and integrated (crap) camera connected to the Autocom through a BT handsfree HB-H20. The reason why you want a separate camera is that you don't want to have to disconnect everything (or get the iPaq out of the Otterbox!) when you want to take a picture on the side of the road.
- I'm planning to get a separate, good camera like a Canon Ixus 400.
All this is hooked up to my Autocom, with their special cable (part 57) to get GPS and phone plugged simultaneously in such a way that they can independantly cut the music when necessary. I plan to add soon their bluetooth module (part 55.5 and 55.6) for my phone (they're out of stock right now at least until next week), that will mean one less cable to connect (and onle less device to charge!).
I've powered my tankbag and the Ottercase through a homemade cigar lighter plug in the front of the bike, but I've ordered a new power kit from
http://www.powerletproducts.com/ with direct connection to the battery and quick disconnect.
Hope this helps
Have a nice time in France, let me know if you need some advice/tips from a local (I'm based in Paris and London but am originally French)