Two on CSS for you

Six Revisions has six questions for Eric Meyer on CSS3. Meyer an author of six books on CSS and a member of A List Apart talks about what he’s most exited about in CSS3 and what designers and developers can do to help with the adoption and development of the spec.

Along the same lines Smashing Magazine puts together a list of 50 Extremely Useful And Powerful CSS Tools.

What do you think is the most powerful CSS tool?