In the video below you will hear Matt Smith talk about how he has geeked out completely over True Blood and absolutely loves it.
To get to the part of the interview about True Blood, fast forward to 3:45 minutes. You will then hear the part where Matt talks about meeting all the True Blood cast at the HBO dinner, that Nelsan invited him to the night before, and how much he loves it and was thrilled to meet the cast.
source: entertainment.gather.com