The MOEN MO-VB Shaky Jimi produces swirling vibrato effects, bringing up those Hendrix and early Trower tones. Couple this with your favorite amp and throw in the distortion or fuzz and you can start your own Band of Gypsies.
There are seperate controls for both chorus and vibe. Lots of room in the Rate and Depth to find your own sound. You can also get some Leslie- type vibrato sounds with a little tweaking.