UL to DHTML Menu (v2.0.1 - Fun with Abstract Hierarchies!)
The (fake, goes nowhere) navigation for this page is a clean hierarchical nested list. Through the use of CSS and JS it is transformed into its current dynamic glory...and yet for users with really old browsers, or using a screen reader, it gracefully degrades to show the navigation hierarchy. The ⇒ icons are even added dynamically to submenus.
This page tested to work (and look nearly-identical) on IEWin v5.5+, Safari v1.0, Netscape 7+ and Mozilla v1.2+. Netscape 6 works, but the first sub-menu blocks don't get put in quite the correct spot. Opera (v7) also doesn't get the position correct for these first-level blocks if the menu is in the (default) horizontal mode, but appears to work in vertical mode. Reportedly IE5.0 works pretty well in vertical mode, too, as of v2.0.1