You may have noticed that WordPress 3.5 beta has been released and with it came a brand spanking new default theme named Twenty Twelve. Personally I am a big fan of Twenty Twelve, I could never get used to Twenty Ten, and love how that theme is set up. If you have not yet found the time to set up a beta installation on your
live site local machine and played with Twenty Twelve in depth, than definitely check out Konstatin’s post first. He explains at great length what Twenty Twelve can teach you as Theme Developer.