How about the status of your work now? I have a X51V and appreciate your investigation work about the PDA. I hope your investigation is also useful for X51V. Just keep working!!! :)
PS. I have another idear about the usb host for PDA. I did some investigation on the
CFU1U USB 1.1 Host Adapter CF Card and found it's not so difficult to implement the card. I have experiences in using similar function in designing wireless CDMA card. And I've even used the chip before. I think we can at least half the price if we design a card like that. So if someone is interested in this, just contact me. (Mail:
rickyqiqi@hotmail.com)