Hi shappy,
WCW is the manufacturer of the SAT bed (Self Adjusting Technology). Some of their other sites are here and here. There are also independent distributors of the SAT bed including http://myergobed.com/ who are also very helpful and informative.
They make an airbed with various types of comfort layers (polyfoam, memory foam, but no latex) and not a traditional memory foam mattress. While I am not a fan of airbeds in general (you can see the article about them here), I also have to say that because the SAT bed is self adjusting and can adapt to different sleeping positions without intervention … it is among the better designs of these types of mattresses that use air bladders as a support system.
There are many choices in a more typical memory foam mattress (memory foam over polyfoam) and a wide range of how cool or warm each one may sleep. As a group … memory foam is the warmest of the three types of foam, polyfoam is in the middle, and latex is the coolest of the foams. There are also many other factors besides the type of foam used that can affect the sleeping temperature of a mattress. Some of the “coolness” differences between different types of memory foam are in post #6 here and some of the many other factors that can affect sleeping temperature are in post #2 here.
So overall you are looking at the “warmest” option of the foams so if you are committed to memory foam I would look for a mattress with more of the cooling features mentioned in the linked posts.
I would also read this article which may help you avoid most of the worse choices and outlets when you are mattress shopping. The best choice of outlet with the most knowledgeable and helpful people that can better help you make your best choices will usually be a factory direct manufacturer or a sleep shop that carries mattresses made by alternative or local manufacturers. This is almost always where you will find the best quality and value.
If you let me know the city or zip you live in I’d be happy to look and let you know of any local manufacturers or better outlets I’m aware of in your area.
Phoenix