Where can I find simple link ads?

I have an application (not a website) and I would like to incorporate "simple" link ads (1 line of clickable text e.g. "Buy a special edition Michael Jackson DVD at bla bla" or something of that sort). where can I get such ads ? all I get from Google and such are 3 or 4 lines of text to be displayed on a web page.

See original post by nickbir