180 Unit Sonobe Buckyball
I wondered how silly you could get with sonobe, and had a bash at a buckyball, which is a fullerene (technically a truncated isocahedron; you can see a simple model here). It's twelve pentagons—each surrounded by 5 hexagons (20 in total)—making a football shape in England or a soccer ball shape in the USA.
It's made of 32 different colours; in total, it is 180 sonobe units.
I have used the same colour scheme as the coloured dodecahedron (with the pentagonal faces the same colours as the dodecahedron pictured here). This is a black pentagonal based face surrounded by 5 hexagonal based face.
Anyone wanting to build—firstly, you've gotta be slightly mad; secondly, draw a graph and it is almost exactly the same as the dodecahedron (i.e. you always put a flap in the pocket of a similar colour).