It’s already registered so you can install it by:
(v1.0) pkg> add IPython julia> Pkg.add("IPython") # in Julia 0.6
It actually has been around for some months but it was a bit tricky to use until IPython 7.0 was released recently.
I think you would find it useful if you are using PyCall ecosystem. And yes, it integrates nicely with PyJulia.