This is the prefect tutorial.  I found it to be very clear and it totally worked.  I always wondered what the best way to deal with Apache, directory structure, etc. to make Drupal multisite work.  I was able to use this information and configure my Dreamhost account for a multisite Drupal install.  I didn't have to modify the apache config directly.  I went through Dreamhost's control panel to achieve the same functionality.

Thanks!