pageoneresults - 1:57 pm on Jan 19, 2012 (gmt 0)
How many are coding HTML 5 right now?
Everyone in my circles are using HTML5. Google is using HTML5 and has been since 2008.
How many browsers are fully HTML 5 compliant?
As far as I know, most of the later browser are HTML5 compliant. They may not be "fully" compliant but we're that far along where using an HTML5 DOCTYPE is now the norm. For some of us. ;)
Has HTML 5 actually been finalized and rolled out?
Latest published version is a Working Draft from May 25, 2011. And no, it is not officially rolled out. But, it has been in the works for 3+ years and most of the spec is complete. There are some remaining issues that are being addressed and I would expect to see official rollout this year or next.
You can safely use the HTML5 DOCTYPE from my perspective. I've been using it for 2+ years now.