ICE compounds, sample models and docs for version 3.0 are here
Docs for version 3.0 are here
As I've mentioned above, main new feature is completely new method of guides-filler interpolation. Finally there are two master emitter nodes, called kH3 Emit from NurbS and kH3 Emit from PolyMesh. Both are able to switch from one-step random emission, to guides-filler mode. For the rest of how-does-it-works for now, take look at online docs and sample models. Docs are updated for this version, I've added a bunch of pictures too.
My small suggestion is to first take look at "in_between_curves.emdl", there is a new styling operator.
Some other new nodes:
kH3 Grouping by Polygons: creates the groups, following polygons of external geometry ( this is in image bellow)

kH3 Filter by Geometry Volume: similar to factory node, in "in_between_curves.emdl" this one is used to draw a hair parting line.
kH3 Deform Hair: general purpose node, deforms a whole hair by copy of emitter's geometry.
A bit of work went to consolidation, for example all multiple geometry inputs are based only on ICE multiple ports, there is no 'forbidden'

However, because of new guides-on-triangle-corners method, still there is a small chance for weirdness in rendering (at start of ICE tree, three or more guides are on top of each other), but I think I'll be able to fix that, following a some nice explanation.
Also, both 'big' and 'lite' kH Follow NURBS has one more user parameter: the end of interpolation along X of NURBS surface (it's called 'AB End') - because automatic method didn't worked well. In docs, there are a few pictures just about kH Follow NURBS.
Tutorial on Autodesk Area is OK for new stuff too.
cheers