As an iPhone user and iPad drooler, I'd like to see PowerPress add support for the audio and video tags of HTML5.
My own requirements only call for audio, but I am sure many people would like video capability as well.
From what I've read, it's a pretty straightforward implementation as described
here.
I guess there would need to be browser detection and possibly some extra interactions with WordPress to declare the page as HTML5, but hopefully this is possible?