At last PhotoWalkthrough is watchable on an iPhone, iPad or Android mobile phone. I've been playing around with some HTML5 video support and I believe I've found a solution that supports just about every browser and platform. Embedded below is the latest show which you'll see either as an HTML5 embed or as a flash object depending on what you're using to view this page.
I'm posting this to ask for your feedback on how successful this experiment is. If you've had trouble with this post or if you just want to say that it worked please leave a comment.
UPDATE: I suspect this isn't working for Firefox users. I'm still refining the code, though.