Hi okapi, yup these are on my todo list.

Except you mention translating styles to layers - there was a previous discussion on the forum here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=3790.1

And the consensus from that discussion seemed to be that layers were kind of a vestigial feature in SketchUp and not really regularly used, so it would be better to transfer styles in MoI as material assignments in SketchUp, not as layer assignments. Does that approach make sense?

- Michael