While shopping in 30th St Guitars today I picked up a Maestro PS-1A phase shifter:

I pulled that pic of the webs; the unit I purchased looks just like this one, but I haven't taken a pic of mine yet. (Camera died)
They also have Maestro fuzz I really wanted but don't have the extra 400 bones! :banghead:
The sound of this unit is AWESOME! It only has 3 speeds, but they are all usable. It has a captive AC power cord, a physical power button, and a mains fuse (!!), as well as a Molex connector on the back for hooking up to a Maestro remote control footswitch (lol -- this unit is made to be put on a table or mic stand ... it's HUGE!!).