I'm always inspired when I go to the css/edge site, but I've just found the tutorial over there for Pure CSS Menus and its just such a cool concept — using the :hover attribute for other elements is great, and I hope that all the browsers will eventually support this. For now, its Netscape/Mozilla specific, but still cool.
And then, I found #misguided through web-graphics and there's several easy ideas for Image Rollover Code and Expanding List Script. Its so easy that anyone should be able to implement it, not just javascript/dHTML goddesses!!