Here's a list of the Farscape comics to date:War Torn
(2002) a Wildstorm comics 2 issue series. Not sure where this fits in the timeline.
BOOM! Comics Titles that start after The Peacekeeper Wars
:The Beginning of the End of the Beginning
(2008) the first 4 issue series, which is also available as a collected hardback.Strange Detractors
(2009) 2nd 4 issues seriesGone and Back
(2009) 3rd 4 issue series
In November the ongoing series will start. Here's the cover (or at least one of them):
There are also these 4 issue series from BOOM! that are set before The Peacekeeper Wars
(2009) which is set before the series started.D'Argo's Lament
(2009) which is set between the 16th "Revenging Angel" and 17th "Fractures!" episodes of Season 3.
There was also a Farscape Scriptbook
(2009) comic book from BOOM! as well. It's basically the outline for the first comic book series. Cool book.