This looks very nice!
FreeStyle MenusThis is an XHTML compliant, CSS-formatted menu script, designed to work with the current generation of standards-based websites. The menu data is stored in the HTML document itself (unlike other JavaScript menus) as either nested lists or disparate DIV tags, and the script manages the showing and hiding of these elements with customisable timer delays.
XHTML Strict, CSS menu - it's accessible and keyboard navigable as far as I can see (gonna investigate further later). There's some very nice stuff on this site.
