Yes, there will be some Farscape cast going this year as well. It is Farscape's 10th anniversary so they are having a Farscape track. Lani Tupu, Paul Goddard and Virginia Hey are the ones that have been invited so far.
As for Ellen.....I submitted her application to DragonCon and am hoping for the best. At this time, DragonCon has actually said no to bringing her in. I am hoping that the writing campaign that was started helps to change their minds. I think they are making a mistake not inviting Ellen to DragonCon.....don't you?? ;)