At the moment using the finger on non capacitive WM devices means: sometimes it works and sometimes it does not work and I have to try it again and often again and again before I get the intended result. It takes so much more time for me than just using a stylus. IMHO the result of modern WM devices is disillusioning. Till now I could not find any good WM phone, with a good stylus and a big display (3.5 inch minimum) where Pleco really works well. As long as this is state of the art on WM I prefer using a stylus and also 5 way navigation pad. But the companies won't let me. More and more devices bring no stylus or a stylus for dwarfs (so that it is no fun to use it). No modern device (with big screen) has a navgation pad.
I think therefore the HD2 looks really interesting as an alternative for me to make finger usibilty really better. But I am afraid Pleco and probabbly WM 6.5 still needs a stylus. I think if there would be a stylus I would not hesitate to order it as soon as it is available. But there is not.
I do not know what the new PD iPhone interface looks like but the WM interface IMHO really needs a stylus in so many cases. For example using of Manage Flashcards screen definitely could not be used with out a stylus. Did you already ported it to iPhone interface in your lab?
Even if handwriting recognition on iPhone works without a stylus I do not know if the same is possibible on WM because it was originally designed to use a stylus (probably true even for WM 6.5). For example: is WM able to draw small lines just using a finger (as the iPhone probably can do as you have shown)?
Even though I am not optimistic about this topic I will keep an eye on the HD2 and Pleco usability because at the moment I did not find any device that is its money worth and at the same time is a good choice using Pleco well.
I think an solution to this dilemma would be really needed because:
1) iPhone is no alternative for me and many others: I do not like the closed environement that Apple dictates. At the moment it would be my last choice.
2) Waiting for WM 7 can be probably a year or more. To far away to wait for it or to speculate on it. It seems that a focus will be working on online apps like facebook or so that does not affcect Pleco as an offline application. This focus makes me a little bit afraid about the result.
3) An online version of Pleco is a nice to have but no solution to replace an offline version.
Hope very much during the next months anything will change to lead to a new solution.