As reported in TVGuideMagazine.com, during a Dollhouse conference call, Whedon revealed that there are plans for a sequel; he's just debating on how to go about it-- stay with his original shoestring budget or go with a bigger budget production.

I just want him to release his numbers from the first go-round.

C'Mon Joss! We can't join the party without some info!

Thanks to user Melchidezek for the tip!!!!