How good is the html-5 compliance for the webos browser so far (webos 2.x or webos 3.x). I already saw several threads where people complaint webOS uses an old webkit version.

I think it would be really important, that webOS would support any new html5 function so that THE webbased mobile OS is abel of doing anything webrelated.

From C++ to HTML5: Opera ports game with web standards - The H Open Source: News and Features

Emberwind HTML5