incrediBILL - 2:00 pm on Feb 11, 2007 (gmt 0)

My industry has nothing to do with it.

Google's Webmaster Guidelines plainly state:

Submit your site to relevant directories such as the Open Directory Project and Yahoo!, as well as to other industry-specific expert sites.

It's a signal of quality that the search engines examine (several top SEOs say this) when ranking your site and serious businesses use those directories.