When I saw those Daleks, I thought exactly the same thing.
If River Song is in the next episode, that means the Doctor gives his screwdriver to her, because she has it in the library episode.
And I forgot to mention, Daleks serving tea is the best thing ever. "WOULD YOU LIKE SOME TEA?"
The fact that it's a Dalek makes it twice as funny. xD I want a Dalekservant.
Also, a friend of mine is writing his own episode and building a TARDIS, and we're going to film it in the summer. Could be...interesting.