Ok, on some sites I see that Adsense is placed everywhere and sometimes a random post comes up where it's just pure adsense. Is there a special way to do this for vBulletin? The only site I know of right now that does this is http://namepros.com. I am intrested in doing this for my forum, http://clan-nation.net, I have the latest version of vB and am using the default skin. I don't know if that means anything i'm just showin' ya!
You can put Adsense anywhere, but make sure it doesn't break to TOS and at You should have a better placement so that u can got clicked more...
have a look at my forum http://www.thelocalforum.co.uk/forum/ The bit above nav, next to welcome block works quite well... Appart from that i never really made much money with any kind of forum.