On my older forums I've always used either two or three - that is, one at the top and one at the bottom, and sometimes an extra one at bottom, but with other content, such as a legend and the number of members, etc. between the two bottom ones. Do any of you have any opinions or wisdom regarding the "right" number of ads which can maximize revenue and somewhat help the user (my ads are relevant to the subject at hand)....as opposed to the "too much" craziness some sites display? I've been to a google corporate adsense seminar, and they seem to use 3 as the best number - but that might be for their adsense and not totally relevant to my case - where many banners are privately sold by me. My forum is a DIY home improvement subject - if that matters. Any opinions welcome. BTW, I've had decent results - both in adsense and privately, with 2-3 on a page. I guess I am wondering if any have experience with using 4 or 4+, or is a point of diminished returns?