Nice article from 456 Berea Street on maintaining the quality of your markup once you pass a design along to a client. It advocates the use of Big Red Angry Text, which is a CSS trick for highlighting any deprecated elements on the page.
I like this presentation of bar graphs using pure CSS. From CSS superhero Eric Meyer.
Jehiah has a good article on how to deal with the ridiculous default length of buttons in Internet Explorer.
CSSJuice has an inspiring post highlighting 20 well-designed portfolios. You may notice while you are there that I am a sponsor of CSSJuice now, and will be for the next couple of months, for some work I did for Wallace.