CSS-Tricks Screencast
We spend an entire hour looking at a Photoshop design and writing HTML5 markup that describes what we see. We try and be as semantic as we can and discuss the challenges of that as they come up. We don't write any actual CSS, but we discuss CSS as we go, because markup choices and where we do/don't need classes/ID's are directly related to that.
http://css-tricks.com/video-screencas...
