I launched the KitchenSink on my Nexus 7 (Chrome, 4.1.1) for the 1.1.1 release and the keyboard doesn't come up when I tap. In fact I can tap on the nested list and get to the examples and things are working as expected.
We were actually able to narrow it down to a CSS property we used. The property is "-webkit-user-modify: read-write-plaintext-only;". Once we took that out, the problem went away.
We had to use it in android versions prior to Jelly Bean in order to fix the problem where a white box was drawn over input fields. But it turns out that in Jelly Bean, that's fixed, and the above property causes the soft keyboard to pop up every time you tap somewhere.