The idea is simple (or so they say) and is just like the previous viral attacks but instead it is done with favicons (a picture paints a thousand words). When an ALT tag is used to describe your image with an alternative text, this can help to improve your page relevance. In other words, if ALT attribute contains keywords that are specific to your page's topic, it will help your keyword density.
Moreover, when optimizing a site/web page for Google, remember that this attribute is taken into great consideration by Googlebot when spidering and indexing your pages. Thus, the ALT tag of an hyperlinked image tag has the same importance of a text link.
———Copy and paste the VIRAL-ICONS and instructions below this line———
Important Update - Please read here!
1) Copy and paste the matrix of “Viral Icons” below courtesy of Ilker Yoldas from The Thinking Blog. (to support Ilker’s quest of launching his own Internet Startup with a student budget, please consider subscribing to the Full RSS Feed and enjoy interesting posts in the meantime. "Knowledge grows when shared!").
2) Upload your non-animated favicon (GIF image of size 16x16 pixels) to ImageShack, a similar free image hosting server or to your own server provided by your hosting service if you have one.
3) Substitute the Host Icon and one of the “Viral Icons” in the matrix with your ALT text of choice and your blog’s URL. Maximum of 3 specific keywords for the ALT text are best for it to be effective.
4) When you get a ping back from someone that has your icon in one of their “Viral Icons”, practice good karma by copying his/her Host Icon’s code (automatically the associated ALT tag will also be copied) and paste it over one of your “Viral Icons” below.
5) Invite your readers to do the same and soon this can grow virally.
Important: Once I get a ping back from you (I promise to do the best I can), I will add your favicon and the associated code you designate as “Host Icon” here, replacing one of the “Viral Icons” from the matrix above. Feel free to drop a comment here with your blog URL, ALT tags and favicon URL (we don't mind if it is the same all over the blogosphere).
Optional: Display the “Viral Icons” badge on your sidebar and promote your blog. As more and more bloggers copy and paste the “Viral Icons” from the matrix above, the more backlinks you will have with your ALT text, and in turn the more promotion your blog with get. The sooner you participate, the more link love you will receive!
———Copy and paste the VIRAL-ICONS and instructions above this line———