There have been some people who talked recently about this subject. Should blogs have any ads or should ads be banned from such pages?

When you have a lot of floats which you wish to style in a table-like manner, you will run into some trouble. We all know you shouldn't use floats to display tabular data, but if you want to create a palette of colors or some other kind of widget which needs this kind of styling, you will be tempted to use floats.