html5lib Deployed
It what may very well be the first public deployment of code based on html5lib, earlier today I pushed an update out to Planet Venus that uses html5lib to convert tag soup into well-formed XHTML5, and you can see the results at Planet Intertwingly.
Future plans are to explore creating a namespace aware DOM to SAX interface and (when available) use that as the fallback instead of sgmllib for parsing feeds with the Universal Feed Parser.