On forums often one will notice adsense units that display across the page like the 728x90 leaderboard. However, rather than the advertisers showing up in blocks - 4 across the screen they are listed like in a line. 1st line is a link - than text - than url and this is repeated 3 times. So, I guess you could say the advertisers, text, url are stacked on top of each other rather than side by side. Any ideas which adsense unit is used. It seems to be the 728 x 90 but how to control and make it look like that?