While it is true that we all grow tired of our web sites and think we need to change them. The search engines are very suspicious of a few things you might do and not realize how this impacts the way they rank you in search results.
Here is a great article on the subject by Eric Enge he posted on Search Engine Watch on Oct 19, 2010
5 Website Changes That Will Hurt Your SEO
Significant modifications to your website can impact your short-term SEO efforts. Here's how to properly handle changes to the domain, URL structure, content, Whois record, and theme....more
