The mattress and topper finally arrived here from Michigan on Wed, Nov 26th.  We could not set it up until Fri as that is when the old bed was going to be picked up by JCPenneys. So it took 9 days from order to delivery; Michigan to Oregon. FBM did send out a UPS tracking number as soon as it was sent. As you can see by the pictures, it was packed up very well and although the boxes look a little ragged, it was well packed inside with several layers of plastic. On Friday morning, I went and picked up the two king foundation pieces from the local furniture store and then waited for the shippers to come and pick the old bed up.

They arrived just after noon, and took the so-called "green" Simmons mattress and foundation set away, so we were able to then go ahead and set up the new king size latex mattress set. To call that mattress "green" is really stretching the core of the English language, but I guess they have a right to do it. 
Here's what we ordered, the latex is from Foambymail:
1 King 6" Medium ILD Latex core - $580
1 King 2" Soft ILD Latex topper - $185
1 King terry cloth mattress cover from Foambymail - $20 upcharge
1 KIng all-cotton (heavy) mattress cover from ShopSatin.com (spare cover) - $23
2 XL twin Englander 7" foundation pieces (very nice for the price, from a local store) - $190
Grand total for 8" King sized latex, with foundation and extra cover - $998

I took the advice of a post I had read here to put the packaged foam up on the bed and unpack it there. This was certainly the easier way to do it. The boxes weighed 106 lbs for the king 6" medium ILD core, and 35 lbs for the 2" soft ILD topper. Heavy stuff, for sure. And for chris137 who just had a problem with his specs, this works out to be 4.9ish lbs/cf. So it's a little less than advertised. But I am not worrying about it. I'm more interested in whether it does the job or not.  We placed the big piece of packaged latex up on the bed and started to unpack it. This thing was really encased well in multiple layers of plastic within the outside cardboard box. After several careful cuts of removing plastic and what looks like their ticking material used as rope, we finally got to the one bag that actually contained the mattress. When this bag was cut, you heard a big whoooosh and then the mattress took on about twice its size in volume.  Then it was a matter of finishing the removal from the bag, then figuring out which end was the long end (not easy on a 76 x 80 size). Ended up measuring and then spread it out correctly on the bed.  The Terry cover has sort of rubber nubbins on the underside to keep the mattress from moving around. Like you might see on kid's slippers. It is a nice cover.  The 6" piece did come already within the cover which made it easier to deal with.  So after it was spread out I unzipped the cover all the way around and then repeated the unpacking process with the 2" topper.  It too let out a big whoooosh when it finally got its air.  Both of these did not take any time after that to come to full volume. Minutes. The topper was then laid out on the core and zipped up. Pretty easy. Entire process took 45 minutes or so.

Initial impressions:
The latex looks very similar to other Latex products I have seen, both in pictures and actual. Color is whitish. It does look like this might be more of a 2nd piece and I say that only because I notice a slight dent, or hole, or other imperfection here and there. I see nothing that would in any way alter what I'm looking for with the latex of affect the way it would perform. Just cosmetic stuff. There's a slight smell but not much. My initial reaction to the feel; soft on the surface but supportive underneath.  Laying on my stomach feels a whole lot better and supportive than the other bed.  I am both a stomach and side sleeper and my wife is a side sleeper. We're not big, 155 and 135 lbs, so we did not want to go the other way and get something way too firm that both of us would have problems with.  We don't bottom out sitting on this. I think the foundation has a little give in it which helps with this. I bought the foundation and sized it exactly so the finished hieight of the bed would be about 25" , which is a perfect height for us.  The other mattress was 31" high and was a probem getting out of bed and also sitting on, it was just too high. This seems to "sit" pretty well and is more supportive than what I was expecting.

Update after first night:  I slept pretty well, did "feel" the mattress some, it was firmer than I thought it was going to be. Being new I was conscious of it. It didn't really wake me up or anything like that.  My wife said she could feel some pressure in her shoulder area but like the feel of it. Overall I think this is very good. I know it will take some getting used to. We are going to eventually put some sort of mattress pad on it, and I think we just need to sleep on it for several nights and see if we only need a bare minimum of pad or something more like the Costco Cuddle bed pad. If needed, I might also put something underneath it too, like a 1" or 2" firm piece of HQ foam.

I wanted to post all of these setup pictures as these are exactly the type of questions that I had myself but could find no reference to. If they can answer some questions for anyone, good.  The pictures have been resized down quite a bit to make posting and viewing them easier, but it does reduce the quality some. Note* - thank you Sager for the coding help. It's been awhile....