Images And SEO

It is said that using the alt attribute in the image tag can help with your search engine rankings. It is also said that you should name your image file the same as your keyword.

But is this really sound advice. Today I've set up many different pages to find out what is the optimum format for an image.

http://www.peterclaridge.com/seoplayground/spundiktribble-1.htm

http://www.peterclaridge.com/seoplayground/spundiktribble-2.htm

http://www.peterclaridge.com/seoplayground/spundiktribble-3.htm

http://www.peterclaridge.com/seoplayground/spundiktribble-4.htm

http://www.peterclaridge.com/seoplayground/spundiktribble-5.htm

http://www.peterclaridge.com/seoplayground/spundiktribble-6.htm