I've got a couple of things to add to the topic, starting with a bit of history.
Circa ~2000 or so my engineer friend and I were working at a University research institute, and we were given an SL-5000D to evaluate. More importantly, we had it directly handed to us by a VP of R&D at Sharp, Japan.
Now, a couple of weeks ago, my friend contacted that VP and had a nice, long chat about the Z, it's shortcomings, and possible market. We found out a few things.
1) That VP has since changed projects. He currently heads up the team for the W-Zero 3.
2) Sharp won't be abandoning the Z in Japan.
3) The reason why they had such a bad relationship with the open source community was literally: They didn't understand it. They didn't know what relationship all those coders had with Linux, or why they'd bother asking for source code. Now, the Japanese mindset is a very, very strange thing but, unfortunately, I've learned enough over the last couple of years to actually believe this statement, sickening and disenheartening as it was. (The VP was actually a very nice man, and had we thought to sit him down two years ago and actually explain a few things to him the Z might have been a different unit today. The lost opportunity that this represents is unspeakable )
4) The Z is basically a glorified dictionary to them.
So don't expect the Z to go away, don't expect any of the features we want to ever show up, and don't expect to see them ever sold in North America again.
Now, before anyone asks, my engineer friend contacted the VP through the head of the research institute we used to work for. I don't remember his name, and I've since misplaced his business card I was too young at the time to consider what a boon that kind of contact could be... The institute itself was reseaching medical applications of video conferencing technology, and had strong ties to Japan (We were partnered with a Japanese Doctor who was developing software for collobarative review of video, and we regularily had prototype equipment from Sharp, Sony, Panasonic, and Mitsubishi.) It was kind of funny having the VP from Sharp through with his entourage - 3 or 4 people in all