Here are some pics that show the Lightracing "Jounce Shocks." They are hydraulic bumpstops, filled with shock oil and charged with nitrogen. Lots of people call them "air bumps." They assist dampening all the time up front in this set-up, and save the shocks and bring things in for a nice landing in the rear. Supplemental bumps are installed for good measure. Bracketry is all SLR.
The system works great, and as you can see from the Baja shot, the profile remains fairly low--and stable. It can really carry a big payload and still go fast. There's more to dial in in the rear (more compression travel is next on the list) but it's a lot of fun just the way it is now.