Cusimanse (Crossarchus obscurus) now time-share an exhibit with the Meerkats at the Great Rift Valley section, though geographically inaccurate. Nevertheless I'm happy they are at least on display now. Still very shy though and I was not able to see them.
The Cusimanse were never in the collection plan for the Rainforest, they were always meant for the zoo. Admittedly they don't fit the "Ethiopia" theme, but they do provide an interesting and relatively unusual species to see.