HTML5+CSS3 Framework like BluePrint/960gs?

I'm starting a side project and want to build it with HTML5+CSS3. Backward compatibility isn't a concern.

I wonder if exist a framework similar to BluePrint/960gs. Mainly, I'm looking for the grid system & typography. The best (and only) I found that plays nice with the new HTML5 tags is Less Framework, it's a good start but I wonder if something better exists?

I think http://52framework.com/ its better!

Try Susy.

There's no reason you can't use an existing CSS framework with CSS3 properties; CSS3 is not backwards-incompatible.