Here are some good places too:
http://www.templateworld.com/free_templates.html
http://www.free-css-templates.com/free-templates.html
http://www.freecsstemplates.org/
http://www.free-css-templates.co.uk/
http://www.smashingmagazine.com/2007...and-templates/
As someone else wrote, there's TemplateMonster.com plus there's also BoxedArt.com and Designload.net where you pay a subscription 3, 6 or 12 months and you can download as many as you want.