Where was this little beauty two years ago? Layout-o-matic gives you solid CSS layouts in four easy steps. Great work.
If you’re new to CSS layouts then this layout generator will be an excellent place to learn one method of doing it. Seasoned web designers will recognise the many problems associated with this (floating) method. One hint: Add something to your CSS that deals with overflow of content in the DIVs or that second column may fall below the first one, giving the impression that it isn’t there at all.