+1 Thumbnail previews
http://moi3d.com/forum/lmessages.php?webtag=MOI&msg=9391.1

I like idea of thumbnails where user can optionally set viewport to create the thumbnail.
Not what I'd class as essential but will help usability a lot. Likely even more valid when we get to grouping
and pullling in reference, tagged or hierarchical organised objects in future versions.