I have a direct question about file structure.

[HeadWebChef]

This question is about a new file structure and SEO friendly URL's.  Does a file name make a difference? I have a direct question about file structure.  Our old site was formated with a URL of http://rousechamberlin.com/about_us.aspx  our new site is structured http://rousechamberlin.com/AboutUs/  no file no extension.  As the SEO guy of the company and not the programmer my feeling is this is killing us.  Does anybody have any thoughts on this?

[johnshearer]

from an SEO perspective; they are identical..the underscore maybe easier for user to read

[KeriMorgret]

What your gut may be telling you is that you need to have the server redirect the old URLs to the new URLs. That old URL is giving me a page not found, instead of a 301 redirect to the new AboutUs page.