see u cannot just simply convert tables into DIV...
u need to learn that... try being a regular visitor of www.css-tricks.com and have a look at at www.cssmania.com where u can get a lot of DIV based website...
u can search for fundamentals on the net and practice that...
web2.0 i myself am not confident will let u know if i more links... u keep following www.css-tricks.com as that is a great place to be in..