The dudes at
eConsultant has put together
a list of 71 links to different articles and examples of CSS-based navigation and menus.You'll find drop-down menus, tabs, lists, contextual menus and much more.
I'd say that's more than you'll ever need, period.
Some time ago I was determined to make my own blog-enginge and I don't know how many times I actually started coding on something that, later, would be sent to the trashbin. I had some plans involving Ajax and Javascript-effects but nothing was good enough to save.
Then I saw
Logahead and got inspired again. Logahead also uses of Ajax but in a different way than what I've planned. I wanted to use Ajax in the actual navigation of the blog, posts shoud be fetched with Ajax, comments would be posted with Ajax and such.
And here you have it, version 1.0 of what will be a fully functional blog-engine. So far all navigation works, and even though I use Ajax a lot the blog is still indexed correctly by robots and all links can be copy & pasted if you want to link to a specific page.
I'm currently implementing a XML-RPC backend for pingbacks and Blogger/B2Evolution compatible API's.
Let's edit this one aswell...