We're at 1.6 Alpha and you're using a pre-1.0? What tripe
. You should try Firebird.
There are a whole lot of things you can do with HTML tables that CSS still can't do in terms of general fluid layout. On the other hand, there are many things you can do with CSS that HTML can't do (like positioning, rollovers, and block changing). It's a tradeoff, but unless you're new to the whole web design scene, CSS for layout is far better. If I were to go into details and examples, I'd make this post waaaay too long.