Phase Shifters ? what kind were they using?
Heres what iv seen Josh Homme use Pedal speaking

Way Huge AquaPuss
Analog Delay Bass Micro synthesizer
Boss SD-1 and a Boss OD-1 (im not wich ones hes using now a days)
Hughes and Kettner Rotosphere Mk 1
SIB Echodrice
Jim Dunlop Cry Baby Wah pedal
Earnie Ball Volume Pedal

And thats all iv seen him use in the concerts iv been too and i made sure this is what hes used

Oh one other thing..now this is insane but i cant help but try and Identify ever every bands equipment i can..i got Sound Garden Rage Against the Machine Kyuss White Zombie as many as i can..Now im on Queens of the Stone Age and just when i think i got all of thier crap the new Little Sister Video iv u pause it at the
1:50 mark at the points wher all u can see is the blue backround Josh Hommes feet and 2 pedals..the one on the right im pretty sute is his Rotosphere and the one on the left im not sure but it comes in pretty clear if u stop it at the right time..is thier anyone as crazy as me who has paused this at the 1:50 mark and seen this Pedal in the Little Sister video?..if so please tell me what it is (its the pedal he presses when he does the little solo stuff)

A tubescreamer.

looks like a matchless "hotbox" and somekind of frantone thing, maybe a "brooklyn overdrive"