Which browser has the best support for HTML 5 currently? [closed]

Answer 1

Ones that are built using a recent webkit build, and Presto.

Safari 3.1 for webkit
Opera for Presto.

I'm pretty sure firefox will start supporting html5 partially in 3.1

All support is extremely partial. Check here for information on what is supported.

Answer 2

http://wiki.whatwg.org/wiki/Implementations_in_Web_browsers has information maintained by the WHATWG community (and everyone who drops by and edits it).

Disclaimer: I'm a member of that community.