It is advisable to use tables in HTML pages (now that we have CSS)?
What are the applications of tables? What features/abilities does tables have that are not in CSS?
Everyone so far has said how tables should only be used for tabular data, and this is true. Take a look at the HTML source of any page on SO and you'll see that they have a different idea...
I think their rationale is that sometimes using a table is just so much simpler. Though, there are a lot of really good usability reasons why to avoid them.