I ran across a nifty little online tool that tests your browser for HTML5 readiness. Here’s how several browsers that I use scored:

• Google Chrome (Mac) v5.0.342.9 beta
  Scored 134/160 - No Web SQL Database and no geolocation.
• Safari (Mac) v4.0.4
  Scored 115/160 - No geolocation and limited form support
• Firefox (Mac) v3.6.3
  Scored 101/160 - No section or grouping elements and no form support
• IE8 (Win) v8.0.6001.18702
  Scored 16/160 - No comment!

We are getting close (with the exception of IE) but we still have much to do.