The first HTML5 iPod/iPhone/iPad App is finally in the App Store.
It's called HTML5 Reference and has been there for 3 days.
This app will be continually updated as things change in HTML5 development so keep it handy.
Here are more details: http://steven-fernandez.com/html5-reference/
Hope you find it helpful!
p.s: Can't wait for HTML5 to take over