I am to buy an X51V and I would like to use it as a limited desktop PC as far as a carputer. I spent several days searching the web collecting information and I think a brief could be of general interest.
X50/51V seems to be the only one PDA in the market with VGA out
(
http://www.firstloox.org/VGAppc.htm),
using other PDAs some sort of presentation interface like this one should be required:
http://www.colorgraphic.net/newsite/..._overview.html
It is very expensive (+$300.00) and it seems to be very limited.
Here there are a couple of reviews I found about Axim VGA output:
http://www.aximsite.com/boards/showthread.php?t=87487 (thaks DeMoBLiTzer! :approve: )
http://www.pocketpcthoughts.com/arti...,41409&start=0 (very good! :approve: )
In both cases VGAout seems to be good enough including for video playback.
On the other hand, X50/51V does not provide USB hosting. While it is not a big problem when using it as desktopPC because we can use a BT KB/mouse, it is the major drawback when using it as a carputer because all sort of car TFT cames with built in USB touchscreen.
I found several
possible solutions but I still haven't found someone reporting to have a touchscreen+Axim working:
1) Adding a Compact Flast USB host interface.
Ratoc CF seems to be the only one product in the market:
http://www.ratocsystems.com/english/...ges/cfu1u.html.
Searching aximsite I found lot of compatibility / performace problems using Ratoc. :exc:
If Ratoc was valid, additonal driver problems could appear, here there is a driver that could work:
http://www.egalax.com.tw/eg/drivers.htm (thaks new2axim!)
Ratoc CF is expensive ($150.00),
forum Ratoc owners help would be apreciated to find out if it could put a touchscreen to work 
.
2) Could it exist a converter from general USB client device to bluetooth?.
I found some specific device for USB GPS and USB printer, but nothing about
general porpouse.
Perhaps it would be the best solution because it is more confortable (wireless) and does not eat the only one CF slot available, keeping it free would be interesting for more advanced carputer functions.
3) At this aximsite topic there are peole trying to build some sort of external interface, I does nor seem to be working yet...
http://www.aximsite.com/boards/showt...2&page=3&pp=24 (thaks new2axim!)
4) Also here there are someone who is trying to enable USB hosting inside X51V, good luck!
http://www.aximsite.com/boards/showt...light=kill+usb