If you are lost in the graphics you can revert to the main site theme, Garland. (The page will reload.)
This site uses Drupal 6, a fantastic platform that lacks the large selection of extended modules available for Drupal 5.
As the modules become available all Drupal 6 sites we'll be able to add features, so please encourage the developers of your favorite modules to get up to speed with Drupal 6.
Very simple theme with blue bars as accents over a white background, great for the minimalists. It features 2 columns with fixed width and 5 regions.
It has semantic code, but the sidebar appears before the main content making it slightly less desirable in search-engine friendliness terms.