Once you have signed up, all you do is insert a small HTML code on your site. They recommend that you have at least 500 visitors a day, but make exceptions for good quality sites. You will get a personalized username and password that you can use to check earnings and clicks. If you don't meet the amount set, your total earnings are carried over to the next month. We found this service was fairly reliable and better than most others.
Members can check their stats online and make changes to their account as they wish.
Euro Banner - Aims to provide a targeted banner exchange across Europe. You show banners for other members, in return they show yours. We found that Euro Banner didn't attract as many click-thrus as other services. Link Buddies - One of the most versatile free banner services on the Web. There are no ugly adverts attached to your banners plus you can earn extra impressions by referring other members to the scheme.