Is it possible to cut latex at home? I have a king layer (about 2.6") that I would like to cut in half to make 2 twins. I guess I could just take a scissors and have at it but I'm afraid that might ruin it. So, is it possible to cut this, and if so what  is the recommended method? Thanks.

Yes you can.  You can look at photos from my surgery, go down to reply #9 .  I used a simple cutting tool with a serrated edge and used a sawing motion (back and forth).  At bit messy, but it worked. 

Other people suggest an electric carving knife.  That would probably work better, but I don't have one.

i have used an electric filleting knife, the kind you would use to clean a fish, worked well.  I found that the best way to make a clean cut is to avoid sawing through the latex sideways, I could make very clean cuts if I made progressively deeper slashes by cutting broadly into the face of the latex and tracing from one end to another, repeating until all the way through.

Cool. So, followup question. This is the piece of foam in question. I don't remember where I got it, its latex convoluted foam (fingers down in picture), probably not great quality.

http://s1025.photobucket.com/albums/y311/st3v3k4hn/Convo%20foam/

Its not very old (<2 yrs), but clearly compressed in places, and some of the holes seem to have vanished. Does this mean its just worn out and needs replacing?

Its uncomfortable because its way firmer in the middle. Would cutting this in half help at all?

Thanks...

 Looks like low quality latex.  Possibly 100% synthetic?  I have never seen the holes close up like that, but I don't have that much experience.

 I don't think you have much to lose at this point, but a newer higher quality piece might work better.  Especially if you are saying it is compressed in some spots.