In case you missed it, the list of technologies that make the web platform is at http://platform.html5.org/. Bruce Lawson proposed NEWT on his blog: http://www.brucelawson.co.uk/2010/meet-newt-new-exciting-web-technologies/.
The W3C’s HTML5 spec is at http://www.w3.org/TR/html5/, and the WHATWG’s living spec is at http://whatwg.org/html. More usefully, they also have an Edition for Web Developers, which leaves out some of the more arcane language and is, therefore, more readable: http://developers.whatwg.org/.
The complete HTML5 Boilerplate is at http://html5boilerplate.com/. Remember, just use the bits you need; don’t copy the whole thing verbatim.
For finding out about feature implementation levels, I recommend Alexis Deveria’s site Can I Use… at http://caniuse.com/, the community site HTML5 Please at http://html5please.com/, and The HTML5 Test at http://html5test.com/.
The LabUp! website is a resource for finding or getting involved with open device testing labs: http://lab-up.org/. The chief tester at the BBC, David Blooman, wrote a long and detailed article, “Testing for Dummies,” about how a global organization performs multi-device testing: http://mobiletestingfordummies.tumblr.com/post/20056227958/testing.
Patrick Meenan’s slides for his talk “Taming the Mobile Beast” contain a wealth of links and information on testing mobile devices: http://www.slideshare.net/patrickmeenan/velocity-2012-taming-the-mobile-beast/, and Anna Debenham’s article for A List Apart, “Testing Websites in Game Console Browsers,” is about … well, the title’s quite self-explanatory: http://www.alistapart.com/articles/testing-websites-in-game-console-browsers/.
Opera has written detailed instructions about remote debugging at http://www.opera.com/dragonfly/documentation/remote/. weinre is available to download from http://people.apache.org/~pmuellr/weinre/docs/latest/. You can get more information on Adobe Edge Inspect at http://html.adobe.com/edge/inspect/.