Aubrey at Star Shaped Themes has released two great WordPress Themes.
Red Autumn is bright yet subtle, this theme captures the essence of autumn with vibrant leaves and a neutral cocoa brown background.
Twilight consists of greys, purples, and a whole lot of standards-compliance while still looking fashionable.
Both include templates for archive, category, and link pages, have valid XHTML 1.0 Transitional and utilizes tableless CSS and semantically correct markup.