I'm playing in a three-piece, and when the guitarist solos the sound drops out. I bought an EHX Micro POG, I run the dry out to my bass rig and the effect signal to a guitar processor (hand-me-down from the guitar player) and into a guitar amp. I set the Sub-Octave to off, and the Dry and Octave Up all the way. When the solo starts I stomp on the switch and instant rhythm guitar player. The POG tracks great and I can get any sound I want with the processor. I could run it from the processor directly into the PA, but having the guitar amp on the other side of the stage from the guitar player helps with stage volume and really sounds like another player. And the guitar amp makes it sound more like a real guitar, in my opinion.
If I did anything different it would be to think about buying a full-sized POG or even a HOG to get more voices. Or a hex pickup, then you could do anything. Hope this helps.
Drew
Edit: as Tallboybass mentioned, the downside is that when you turn the MicroPog off, it sends regular bass signal to the guitar amp, so I use an A-B switch as OrionManMatt describes. Also, I set the Dry all the way off, no need for dry signal in the effect out.