Assuming you only need volume up, volume down,
and mute, that's three functions. I can think of
a way to make a Cinema 7 IQ (URC-7800) control
three functions on 19 devices, and that's before
you figure in the learning abilities. Factor
that in, and it goes up to at least 24.

Since the Cinema 7 is only supposed to be able to
control 7 devices, you'd have to put functions on
buttons where they don't technically belong, like
putting the controls for one TV on the 1, 4 and 7
buttons, another TV on the 2, 5 and 8, buttons,
etc. It wouldn't be pretty, but it would work.

Also, the Cinema 7 IQ is relatively inexpensive,
at aynwhere from $16.50 to $25, depending on
where you shop.

-=Ingenious=-