Had a nice email conversation with Michael Hartl about his book.
He has confirmed that EPub and Mobi upgrades are available from his site.
The exact news article covering the details is:
So you can go do your thing!
There's no information at this stage about a second printing with the fixes for the code samples at this stage, but I will be sure to update when I have more news.
Excellent work should be rewarded, and that's my 2c!