How do 
How viable is it to start doing mainstream sites in HTML5 at the moment? I've not let myself look into the full capabilities since I know I'll want to use them but can't due to all the old browser / IE folk...
Are people using it yet? and if so how to they get around compatibility with older browsers?

How viable is it to start doing mainstream sites in HTML5 at the moment? I've not let myself look into the full capabilities since I know I'll want to use them but can't due to all the old browser / IE folk...
Are people using it yet? and if so how to they get around compatibility with older browsers?