I often discuss with my friends on the importance of footer, the discussion mainly revolves around the blog design, but the basic idea can be extended to all type of websites.
For someone footer is only a merely container for credits, something that should conclude coherently the design of the page.
Attention! It has a goodly communicative power.
The reader hope to find in the bottom of the page some information about the web-site and his the project. Maybe it’s a good idea to provide to the visitors more useful indications.
This trend became famous with the spread of blogs and magazines and now many web designers realize beautiful footer with some useful advices.
Below there is a great collection of fantastic footer design. Enjoy it!