Greetings all,
     Ok, to throw my two cents into the pot.  Bob brought up the point
about how poor looking a queen cell is, and Donald countered that it was
because it was constructed in free space.  If the queen cell is that poor
looking due to free space, then why would natural comb, which is begun in
free space be so perfect?  Many times natural comb is started by a few bees
in several locations, not by thousands of bees crowded into one area.
Geometrically, it is one of the best ways to use space with a shape that is
somewhat round.  Square cells would be the best use, but imagine how funny
looking square bees would be!  Good luck all!
Scott