Do you think it is a good idea to exchange banner ads with other websites ? Forums, blogs and so on.
I think it is good to have a link to our website on the other web page. Additionally, there is visual representation as well.
A very good, simple and harmless idea. An effective one too.
Those simple community based promotions will help your website a lot.
I too think it is harmless and helps to build a bond with a fellow webmaster. A partnership is always beneficial.
Only thing to make sure is that you do not put banner on bad website. ie, badly rated by Google for its content or other elements / components.
I see general forums use this techniques to do a simple banner exchange. I love the idea and it is a good way to earn visitors and traffic.
If people help each other, it will be more effective than signature links.