I posted earlier that we bought a latex mattress (6 in core and 2 in topper) from FBM. We tried using plywood over our boxspring, but it still bounces some, esp when we get in bed. So, I'm looking at a slatted foundation. It looks like the Coverest http://www.coverest.com/itemdesc.asp?CartId={78EVERESTC5B21D-E2A7-4B8F-9498-0FBD56F47484}&ic=F1-46&eq=&Tp=
and the ortho mattress at Sleep EZ are the same.

There's also a smartbox foundation at palmetto:http://palmettomattress.com/index.php?main_page=product_info&cPath=5&products_id=38 for about 1/2 the price.

Thoughts?

Thanks.

I went back through old posts and found someone who did what I did-the 6 in core from FBM -and put it on an IKEA slatted base. They used the Sultan Lillaker. There's also an IKEA Sultan Laxeby, which offers more flexible zoned slats.
I'm waiting on a PM, hopefully, about what jiffy524 thinks.

I just bought the smartbox foundation from palmetto for $150.  It does look like the photo linked to above, except I think my cloth cover is a different color.  I have not put the cover on yet, so it is just a wooden rectangular frame with a wooden rail bisecting it lenghtwise and 7 slats running crosswise, widely spaced.  I got it in E.King size so it came as two separate twin XL boxes that sit next to eachother.  I figure I'll fasten them together with plastic cable ties.

All of the wooden pieces are hinged and fold up into a relatively small box 3 or 4 feet tall.  The wood smells nice.  There were some exposed nail heads which I banged in with a screwdriver and hammer so they wouldn't scratch the wood floor or catch on cloth.

I thought I was getting a bargain at $150 for a king foundation, but it turns out it is not usable (for a latex mattress) as it comes.  I will either have to add lots more slats, or just go a head and cover each of the two foundations in plywood.  I have decided to do the latter.  This will cost about $60 in birch plywood from Home Depot, so now my cost is up to $210 plus my labor, which doesn't sound to be as good a deal.  It will be quite sturdy, however.

Another alternative would be to buy a set of closely spaced slats to put on top of the foundation before covering it. Ikea sells slats separate from their foundations.