Puredata hacker's app, textsound, is down to $1! This is the lowest price ever! I haven't gotten around to playing with it yet, has anyone else? I think I'm going to at least grab it now, but I'll wait to hear your reviews for a change!
I think it would be a great way to learn Pd. Just plop in front of your TV and watch Pd tutorials while following along on your iPad! Here is a huge series of Pd tutorials to do just that!