Interesting, when you go to http://html5.com right now it redirects to http://www.apple.com/html5/ – but it seems that the original owner does that instead of Apple.
It is actually quite funny, if you check waybackmachine you will find that HTML5.com was registered in 1999 on an off-chance by some domain investor. The wording actually rocks in retrospect:
OK, so I might have just spent good money on a name that’ll mean nothing, ‘cos XML might take over, but it’s worth the gamble.
In the meantime, if you are either interested in contributing to this site, or have bigger/better(?) plans for this domain, contact firstname.lastname@example.org
Seeing that the site was defaced in 2005 I guess the owner just redirects to the first result in Google once HTML5 got mainstream :)
I don’t think Apple would use Godaddy and have a gmail as their admin contact, right?
Hat tip for co-sleuth work to Mathias Bynens and Paul Rouget.