http://blog.html.it/layoutgala/

A virtual cornucopia of tableless layouts free to use! Not all layouts are compatible with older browsers, but some are. Be sure to check the layout you would like to use in all the browsers you support before using in your layout. The main one you will run into is that the footer won't clear the longest column in some versions of Netscape. Just load it up in Netscape and add text to each of the colored sections to test if it works.  I haven't found a solution yet to the problem, but hopefully will soon.