She is also in a Best Buy commercial. I was reading while watching tv and I heard her voice (it is very distinct) and it was her.
Guy Gardener wrote:
So Felicia Day was on House the other day... And I say: "HEY! ...House, you're Doctor Horrible too."
It's like this gal can't escape blokes with PHD's in Horribleness.
But seriously, who's more Horrible?