Ok lets start with everybodys first worry search engines.
Let me tell you from experience search engines are a never ending hastle. The rules to get better positioning changes all of the time. So here is my solution to search engines, design your site to be search engine ready, like I'm sure you've seen a million times. Look at search engine traffic as a bonus. If you don't know what this means it means that you place a link to a site and then in return it puts your link on there page.