those masonicons are very nice, especially nice are the tools and applications icons, some of the device icons are nice too. i don't like the drawer and drive icons though, but that's just personal preference.
his work is very inspiring though and he is very talented, i also wonder if morphos will get 2-state icons some time, i don't see it as a high priority though.
MorphOS already supports two-state icons, Ken's icons are two state and work fine on my MOS3.2 machines.
Oh I was totally unaware of that! Awesomeness indeed! I will have to experiment with 2-state icons as well now :)