There is that wonderful site TED: Ideas worth spreading also the free application TED on iStore, with all kinds of lectures.
I watch it a lot on my iPAD.
Point is that there is an option to see translation in sub titles, but you see it only on a PC not on the iPAD.
I assume the reason is that the subtitles that are embedded in the movie is done with FLASH.
Can't have my wife to enjoy it - Though...
Any Idea ?