I've checked the A&E site for more details and looks as if this set includes most of the extras that were on the ADV edition (so all the interviews, outtakes, etc.). It doesn't include "The Peacekeeper Wars", but that was packaged and sold by a different company from the rest of the series and is still available from them (oh my ... now only $9.95 at Amazon.ca!)
P.S. A&E is also selling the new release of Farscape in single season packages ... Amazon.ca lists them at $44.45 apiece, so right now getting the whole shebang at once is definitely the better deal.
