Is there a difference between the ways different search engines treat keyword density?
The short answer is…probably ‘yes’. Search Engine Optimizers vary in their opinions on this subject, as they do on many other aspects of seo. However, generally there is agreement that Yahoo and MSN may be more (by what degree is not known) tolerant [...]

One of the most important things you can do to improve your rankings in the major search engines, especially Google, is to increase your link popularity. You can increase your link popularity by:

Reciprocal link trading with other websites
One way link building
In-site backlinks through keyword rich navigation
A blog, Newsletter or RSS Feed

To faciliated link trading we [...]

Apparently IE7 will not be much more compliant to the W3 standards, especially the CSS1 standards, than IE6 currently is.
Needless to say, that will not make it very easy on the designers and developers of web pages, who hope that their product will work in 99.9% of the population. With Mac and Linux gaining [...]