All interesting guesses (though I shudder to think about the e-mails we'd get if we added a strip flashcards feature), all of them, sadly, incorrect.
Stroke order won't be ready until PlecoDict 2.0, mainly because we're not going to invest the time/money in creating a character stroke database until we've got some other uses for it, like a stroke order tester, character component search feature, etc. But it's at the top of the list of 2.0 features.
Voice support is coming in 1.1, I think - we already have one set of voice samples and probably could have gotten some sort of voice feature into 1.0, but it wouldn't have been very good or useful. The one we're planning for 1.1 should work in a lot of different areas, like flashcards and possibly even character magnification.
And we're still trying to license a Chinese-Chinese dictionary, but we haven't managed to do so yet - does anybody have any thoughts on the "Xiandai Zhongwen Cidian" by Commercial Press? It's a little more approachable than the "Xiandai Hanyu Cidian" (which we'd also like to license), in fact it seems to have been designed for middle school students, which might make it a very good first Chinese-Chinese dictionary for a lot of people.