Maybe Chelsea Handler's been pulling some strings, since she seems to have almost as much power as Oprah once had, and I think Whitney Cummings is one of her numerous friends (then again, as nasty and hateful as she is, how is it she actually has any friends)?
But then again, I suppose Whitney would make for a better show than Chelsea's sitcom did... I mean, someone else plays her, while she plays her own sister? That'd be like if Brad Garrett played Ray and Ray Romano played Robert on Everybody Loves Raymond.