There is a fantastic (non-spoilery) question and answer session with writers Elizabeth Craft and Sarah Fain about the upcoming Dollhouse — they were part of the writing team on Angel. 
It has also been revealed that Tim Minear (Drive, Angel, etc) is writing episode 7 — whoo! — and that the writing team have already started writing episode 8!
All I can say is that the interview is definitely a must read. Read it in full at dollhousetvforum.com (opens in a new window.) Enjoy!