In catching up on old digests, I came across the Antares Autotune thread:

<<<Autotune is an effect you buy as hardware, which you would connect to
your mixing board like a compressor or a reverb or whatever.  It also
comes as a plug-in, which is the brains of the effect in software form,
that connects to the virtual mixing board on a computer with either
protools or a competing product installed.>>>

When Autotune first came out, a music store salesperson told me that there
is a hardware version as well as the software version -- and that a musician
can hookup the hardware version and use it in live performance, presumably
pitch correcting his/her singing in real time.  This sounded too good to be
true for a pitch challenged singer such as myself.  I was so skeptical at
the time that I didn't look into it any further.  So now I'm asking those of
you with Autotune know how - truth or fiction?  Or somewhere in between?