A variety of tutorials are available for customizing the original Rokwebify theme. Many of these tutorials can be applied to Drupify as well.
Drupify currently supports only a right-hand sidebar. Since Drupal puts the Navigation and User Login blocks in the left sidebar by default, Drupify has been configured to include all blocks from either sidebar into the right sidebar.
Note from the Maintainer: I'd love to see this theme get updated to Drupal 7, especially if someone could upgrade it from table-based layout to CSS-based layout. I won't have time to do that in the near future, so if anyone is interested in co-maintaining the theme, please contact me.