I'm getting one of
these for Christmas. You can use a Amiga->Scart cable to connect to the unit, plug the VGA from your Voodoo in to the computer input, and the monitor in to the VGA out. It auto senses which is being used, so as long as VGA switches off when you use 15KHz it should change over automatically. There is a remote control to switch it manually should you need to. I plan to mount the unit inside my D-Box, hack apart the remote control, and wire the video toggle button to the reset switch on the front of the tower, which currently does nothing.
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moto