It took me forever to figure out a suitable css replacement for tables in organizing my websites. I finally stumbled upon a great method. Use divs as replacements for table rows, (and here is the good part) spans for dividing the rows horizontally.
So instead of:
<table> <tr><td>blah</td><td>blah</td></tr> <tr><td>blah</td><td>blah</td></tr> </table>
You would use:
<div><span>blah</span><span>blah</span></div> <div><span>blah</span><span>blah</span></div>