What I like about this iPod presentation (made in 2001) is it has subtitles to all important points of the presentation, that makes English more understandable.
Also, the guy - whoever he is - speaks quite slowly and uses simple words. The only idiom I spotted is 'quantum leap', that means 'huge movement forward'.
Here is the presentation:
http://www.youtube.com/watch?v=kN0SVBCJqLs