if you are using font/bold/italics IN your (x)HTML, you are WRONG! Just kidding. Not the way I do things now, but I used to. I think CSS ZenGarden is a great example as to why divs are the best tool for extensible markup....extensible being the focus there.

See how many designs and layouts are easily made all off the exact same code, only altering the style sheet? Table layouts do not have that kind of flexability..not layout wise. And then it just becomes easy to control the look of everything else after that throug style sheets.