Although there's not going to be any new Doctor Who until Christmas -- *sniffle* -- the BBC has just announced that they've cast the new companion. (Apparently they made a big announcement during halftime at a soccer match, which seems a little odd, but, I guess, very, very British.)
They've also provided a little snippet of video for us, in which we don't learn a whole lot about the character, but do at least get to see that she is amusingly irreverent towards the Daleks:
I'll be looking forward to getting to meet her for real! Even if it won't remotely be soon enough.