Hi,
You can try a running version here:
(no guarantee this is in a working state at all times, but we try)
The new UI is in heavy development at the moment, but the plan is to roll it out on
nationalmap.gov.au in the next couple of months. It will also be used by a bunch of other TerriaJS-based projects.
We're in the middle of a major doc overhaul, but the instructions here should be pretty good for building and running it locally:
The only thing I might add is that, if you're running with TerriaJS npm link'd, you should run npm install repeatedly until it stops installing stuff, first in the NationalMap folder and then in the TerriaJS folder. npm is shockingly buggy when it comes to npm link. :(
Pop into our gitter if you have trouble.
Kevin