I tried to download the rules for it, but it wouldn't work for me.
I still have the old White Dwarf with the rules for the Thudd Gun, The Spirit Warriors (wraithlord), and the Imperial Army Landspeeder with the plasma cannon on it. Hopefully, GW will redo some cool rules for the Mole Mortar (my personal fave after the thudd gun), and the Termite assault carrier. I love all that old Rouge Trader stuff, it has such a cool feel to it, the Rapier would be a great addition as well.... I have one question about the Thudd Gun though, where is the Squat crewmen?