
I already have a PalmV PDA with PalmOS 3.5. I never use it. I practically have absolutely no need for an organizer. Yet, I wanna buy a new one. That geek gene in me (that my mother unsuccessfully tried to kill over the years) what really wants is a "truly mobile PC" that just isn't a laptop. So, for the last few days I was shopping around the Internet for a new PDA (preferably a PocketPC this time) that would fit the kind of thing I am looking for. I was... horrified to find out that what I need isn't... invented yet.
One of these:
http://www.blachford.info/computer/superpalm.html
Probably bigger than you'd want and wouldn't have WiFi but it was 5 years ago!
What you really might want to do is wait a year and give Sony-Ericsson a call. The P900 is already fairly close and I expect the next gen will have pretty much everything you want. All the technology is here already, it's just putting it all in one box and getting it to work (it'll probably have 3G thrown in as well).
Of course Nokia et all are also on the case.