This is an interesting string, diverting for a minute from studying...
My own two cents is that I am frustrated because only now am I coming up to speed the real depth of Pleco. I think I have used most ALL the iPhone apps and none compare to the depth of the Palm version. So, I walk around with an iPhone to suppliment, but it sure does not run as my main study tool. The flashcard program for Pleco on the Palm is complicated. But if you are really in the study game, the depth is remarkable in its sophistication. There is nothing like it. I even just created and imported a custom dictionary for "Tuttle Learning Chinese Characters" and it works seamlessly. Not sure where else I could do that.
Getting iPhone versions of any of the modules into the Palm, I would welcome and use. Hopefully "iPleco" will maintain some level of sophistication to set it apart. Personally, I would love to get a great reader that could store words and bookmark. My Palm is currently not "wireless" so to have handheld that accesses global sources as opposed to what I can download to a card makes a tone of sense. Seems this is a perfect application for those times you just want to get something to eat, or head out without a full blown computer.
With this said, from a marketing perspective, I shared in the past that it took me a year and a half to understand what Pleco was. Significantly crippled dictionaries in the test version, etc., I never was able to use it so moved on within 5 minutes. (My loss, unfortunately). Setting aside the significant license challenges, if there was a way to quickly show full functionality for a week or so, I would have invested much earlier. Many people on the iPhone or iPod touch just download things and try them (to the extent they are free or 99 cents), I have literally hundreds of programs that I would never have tried if it was like the Blackberry, where I need to struggle to find apps, etc. The Appstore in and of itself is a great marketing vehicle.
