You can get lots of information about memory foam beds at www.sleepnumber.com. Its a pretty decent website, it has some decent information that you just want to know about.
Oh yes, there are a great variety of beds. Memory foam is not mandatory.
There are many companies and websites that offer memory foam dog beds for sale. Some of these companies that offer the dog beds are Overstock, Petco and Amazon.
You can find more information on memory foam mattress at this site: http://www.memoryfoammattress.org/ and when you are ready to buy Overstock offers shipping for $2.95.
One can find more information about mattress toppers with memory foam on the website 'Overstock' On the website they have articles and videos on this subject.
Memory foam toppers for beds can be purchased from many locations such as Walmart, Target, Overstock, Amazon, Dunelm Mill, JCPenney, Costco, Sears, Argos, and eBay.
The most famous company that make memory beds is 'Tempur Pedic'. Their mattresses are made out of a memory foam that is advertised regularly on tv commercials.
The following are some foam beds available in Walmart; Spa Sensation 3" Airflow Visco Elastic Topper, Spa Sensation 4" Memory Foam Mattress-Topper, and Aerus Natural 6" Eco-friendly Memory Foam Mattress.
Yes, it is made for slatted beds
Yes there are a couple manufactures of foam sofa beds.
Tempur-Pedic is a great brand for memory foam mattresses. They offer different sizes, easy financing, pillows, bed linens, travel accessories, and home and office accessories too. Another great brand is The Component Bed Memory Foam. It is a thick layer of memory foam with an additional memory foam topper. Not only does it offer thicker memory foam than most memory foam beds out there, but it also allows you to adjust the firmness with a remote so you can get the comfort you really need.
One can buy Sensus Memory Foam beds at the following retailers: Amazon, Sleepwear House, Rocky Mountain Mattress, Overstock, E Bay, Best Beds, and the Mattress Underground.
There are many memory foam mattress reviews, to be found on the internet. If you do a Google search, you will find plenty of them.