Many thanks for the great tool Tim!
After trying it out a bit, here are a couple of comments/wishlist items for future versions (I acknowledge that any/all of these could be insurmountable from a coding perspective...):
** I had a coverage of contiguous polygons (landuse map) and was able to display all types as different colors without borders in MapWindow. However, when I exported to .kml, the borders appeared. As I don't know how to deselect all borders without selecting "share style" in the GE editor, I ended up cahnging all those nice colors to a single color...Any way to export without boundaries showing?
** Option to save legend as a graphic component of exported kml file so it can be displayed in the GE window.
** Option to show all polygons but group them by a selected attribute.
Thanks again!