Here are links for 457 Free WordPress Themes amazing, High quality. I searched on smashingmagzine site I found about 457 wordpress themes. which all are chosen and good.
457 Free WordPress Themes amazing, High quality
URLs for as follows:
http://www.smashingmagazine.com/2009/05/18/100-amazing-free-wordpress-themes-for-2009/
http://www.smashingmagazine.com/2008/01/08/100-excellent-free-high-quality-wordpress-themes/
http://www.smashingmagazine.com/2009/11/12/40-free-high-quality-wordpress-themes/
http://www.smashingmagazine.com/2007/03/29/8-fresh-and-clean-wordpress-themes/
http://www.smashingmagazine.com/2008/03/25/15-more-free-first-class-wordpress-themes/
http://www.smashingmagazine.com/2008/08/25/30-free-high-quality-wordpress-themes/
http://www.smashingmagazine.com/2007/02/09/83-beautiful-wordpress-themes-you-probably-havent-seen/
http://www.smashingmagazine.com/2007/08/28/45-excellent-blog-designs/
http://www.smashingmagazine.com/2007/06/26/21-fresh-usable-and-elegant-wordpress-themes/
http://www.smashingmagazine.com/2007/05/07/10-fresh-elegant-and-clean-wordpress-themes/
Have fun!