The name is always "Ian Hickson". He's the only committer on the HTML5 SVN repo:

   $ svn log -q | egrep "^r\d+" | cut -d "|" -f 2 | sort | uniq -c
   7850  ianh

Looks like Mike Hearn, googler and core Bitcoin developer.

In the commit-watchers mailing list: http://lists.whatwg.org/pipermail/commit-watchers-whatwg.org...