You have our permission to say - and please do say that your product is based on Mark-a-Spot, inspired by Mark-a-Spot, or produced with the help of Mark-a-Spot, but you may not call your product or service Mark-a-Spot.
The code for Mark-a-Spot is maintained in two separate repositories: Github and Drupal's own repository.
A full installation and some initial documentation are available on Github. You can easily clone from there as usual by typing
git clone email@example.com:markaspot/mark-a-spot.git
Active development takes place on git.drupal.org. If you are comfortable with Drush, you can clone the project from there and complete your installation with
git clone http://git.drupal.org/project/markaspot.git cd markaspot drush make --prepare-install build-markaspot.make markaspot