I actually haven’t made my way through the first season of Dollhouse yet and it’s something I’m contemplating doing. For that reason, I’ve stayed away from spoilers involving the show except for the more basic things. That includes impressions from the panel and reading reviews/impressions of the un-aired episode “Epitaph One”. So…if you’re interested in that, /Film has impressions of the episode which you can read at this link.
What I can report on is the following: Series creator Joss Whedon is looking to add Summer Glau and Alexis Denisof to the show for its second season. Whedon clarified that although Glau is still a “maybe” at this point, if everything goes as planned she’s a lock.