Yeah the show is coming back, it was axed by sci-fi and i think the company that owned the show had financial problems as a result of the cancellation by the channel. However due to a massive fan campaign from save farscape and also the Henson company which owns farscape being bought back by the Henson family they deciided to make a mini series, it should cover what happened after the last series cliffhanger.
They stated if the mini series does well they might produce more farscape series, possible movies also.