Livescribe Echo (and Pulse) Smartpen 
Livescribe Pencast Player
Available through iTunes (free)
Livescribe now has a free player for their Livescribe pencasts to allow them to now be viewed on an iPad, iPod Touch or iPhone! Since these devices cannot run Flash, a player is now available!
You can download it through iTunes for free
I am starting to download all of my pencasts and put them on a webpage for anyone to download onto their iOS device so they can view them any time!
Here is the website that will house my .pencast files, which are the downloadable ones to be viewed on your iPad, iPod Touch or iPhone.