OT: CSS, Javascript, <Canvas>

[Sivakatirswami]

I just watched some of Apple's videos on iPhone Dev.  
It's all about CSS and Javascript.

I guess I will need to learn a little Ajax-Javascript!

What's a good book to start with?

<canvas></canvas> look really interesting,
but the learning curve is not trivial

I don't know if some cool library to translate the
presentation layer on a Revolution card into a Canvas object
is an endeavor worthy of pursuit or not.

Sivakatirswami