What is a flickr badge? Is just like this.
Some blogger put in their blogs. Is just a few clicks, you can generate you own flickr badge, then paste the code (generated by flickr) to you html page, just that easy.
You can choose different style and layout for your badge, eg. html/flash, vertical and horizontal... Is easy just try it yourself and have some fun.
PS. Since blogger don't allow script tag, I have hard coded the pictures, if you direcly paste the code from flickr, the picture will be randomly displayed when the webpage is refresh.