Just got it finished last week and have been driving it on my 91 mile commute. There are no shackles- ther rear of the spring slides in a track- better clearance and approach. I think they are going to offer the kit either way. Rides good, can't wait to get to Moab. Pics are with 235's but there is room for more.   

looks good. how about some specs? type of springs (app./lift) is the kit available to gen-pop soon? any idea on pricing etc...more more more.....

Kit uses Trail Gear lift springs from rear of sammy and the sammy axle with spacers. Easily swapped to Toy axles. Has shock hoops, shocks, frame gussets and all the steering (which is working great). I think the kits are a little different depending on the year and 2 or 4 doors. The frame horns change between years and bodies. I don't know what the final price will be but I do know the parts that I bought from them that they are using for the kit are not very expensive and they are working well. Here is a pic of the rear spring slider.   

Nice, those tires look bigger than 235's. 91 mile commute!? hope that's round trip!

Is this just in the R&D stage right now? Because I did not see it anywhere on their site

  If they use 3" lift sammy rear springs in the front. How do they lift the rear? Is that a sprung under front leaf setup?

why slider and not a shackle?? It looks like it should be a simple setup, so it should be affordable.

  If they use 3" lift sammy rear springs in the front. How do they lift the rear? Is that a sprung under front leaf setup?

Yeah that photo appears to be a spring under setup.  Spring over would be much considerably taller.
I see blue bits in the first picture.  Probably a calmini kit.  Same could be achieved with longer springs with spacers and creating a better upper link setup instead of the balljoint which would be stressed trying to gain 3". 
A nice compliment to this lift, to stay cost-effective, would be to combine it with some rear springs from a 4dr? (I think) and coil spacers and somehow beefing up the upper link.

Blue bits? I must be color blind, I dont see any blue anything.

   Look at the first pic, the rear lower control arm appears to be blue.

I did have a 3" Calmini kit on this tracker when I did the front swap. The rear still has the Calmini parts and sits about one inch lower than the front. I will be building a four link rear when I swap to Toy axles but for now it will probably just keep the blue parts. The kit has been used on my rig and another 4 door at the Low Range shop. I don't work for them but I know the 4 door has been wheeling pretty hard and I've got over 600 miles on mine. I know all the parts are available and I think they are just testing durability. There were a few changes made early on and I am really happy with the kit. You would have to call them to see when the whole kit is available. You can get shackles if you want, I liked the sliders because they don't hang down so low under the frame in the rear and with no shackles on the front, the approach angle to obstacles is much better. I am a pretty serious rock crawler and have geared the kit towards that.         

I guess I get the idea of sliders, but I have never seen them before. is it bolted on or welded?

  I guess on a rockcrawler in a dry state would prefer the slider setup. But the bearings in the slider submerged in mud and water, wont last long.

Yes, about that slider shackle, how does it work?  As flexmonger mentioned, it has some kind of a bearing or something?  I figure it's not metal on metal just sliding, so what does it have?
Because yes, a shackle in the rear would make it MUCH taller, or else you'd have to put it up front

   Look at the first pic, the rear lower control arm appears to be blue.

Buddy you have great vision! If it wasn't for that tiny bit of light hitting it I'd barley make out the blue.