Being Human fourth series confirmed!
Yayness abounds! Hopefully there'll be more Lee Ingleby. More Lacey Turner wouldn't be entirely unappreciated.
Source - the Being Human blog (contains spoilers for the end of series 3).
Oh, and...whenever Steven Moffat decides to hang up his hat as Doctor Who showrunner (which I hope will be a good few years away yet) - Toby Whithouse would really be a good choice to replace him. Just sayin'. In case anyone from the BBC is reading this. *ahem*