Watched Dr. Horrible at last, and gave up and drew Felicia Day. And by 'gave up' I mean seized an excuse to keep drawing. I am art-starved.
This is the reference - and it's from Google Images, so I don't know if it's an official photo, or a screenshot, or what. From the quality, it's probably an official photo... and half a second with TinEye shows it's actual the main page photo on her website.
And the sketch (ArtRage 3) Not perfect, but was just doing quick practice sketch-painting.
Aaaand the final quick painting on DeviantART (click through for a larger view):