Ulf Pettersson has a great writeup for his new theme release: Modern.
Modern is a light, simple and modern theme for WordPress 1.5-2.0. Page links in Modern are layed out horizontally at the top-rather than in the sidebar-creating a clearer distinction between permanent and updated content. For this reason, it is not recommended to use a great deal of pages with this theme. Currently, only top-level pages are displayed in the top section-making it possible to exclude pages from appearing there.
Modern uses one slightly less common type-face-if present, the blog title is type set in Galliard (if not it downgrades gracefully). Only two image-files are used. The theme strives to use as semantic markup as possible and should validate as XHTML 1.0 Transitional and CSS 2.1. Modern has been tested in Opera 9.0 beta, Firefox 1.5 and Internet Explorer 6.0.
Check it out over at http://ulfpettersson.se/design/modern/