I've been trying to figure this one out for 2 weeks now, still no good solution... 

So here's what I've got: 

3 computers 
2 large displays 
1 small display (the "console" near kb/mouse) 
1 kb 
1 mouse 

My goal: 

To have 3 computers hooked up to 2 large displays, and being able to
control them and preview whats on their screen (one at a time) from a
single console (small display, kb, mouse)....

Think: a presentation where one guy stands at a podium and is able to
control whats displayed on the two large screens behind him from his
small display/kb/mouse on the podium in front of him.

At any given time the two large displays should be showing the video
out from two different machines - and I should be able to switch one
of the large displays to the video out of the 3rd computer at any
time, while maintaining a picture on both displays (no "KVM blackout"
because of a switch).

I was thinking I could hookup the small display+kb+mouse to the KVM
console port, then hook up KVM Port 1,2,3 to the 3 machines to at
least control their kb/mouse. However the problem is with splitting
the video signals correctly to have the large displays actually work.

I'm not limited by the number of KVM's and VGA/DVI splitters I can
use. I just have no idea how I can get this working, and I've been
unable to wrap my head around it for quite a while.

If anyone has any thoughts on the matter, please do post! I look
forward to reading your responses...

Thanks!!

One thought would be to try using one of the more sophisticated
Avocent KVM switches, or multiples in combination. It is possible to
establish a many to many relationship between computers and displays.

Conventionally, in a presentation, the presenter would have a single
display (or multiples) for private viewing. The audience would have at
least one (two in your case). They have a matrix switch product that
will allow you to view any computer from any screen (all
independently).

The products are a bit expensive but definitely among the very best on the market.

Hope this is of some help.

I checked out the Abovent KVM products page, but I was unable to find
the matrix switch product you mentioned. I found a KVM they sell to
allow console to have dual monitors, however thats not what I need. If
you could clarify what you meant by using multiples / many-to-many
relationship, or perhaps even point me to the product which you're
talking about, it would be a great help.

Thanks!