Using MapBox tiles in Drupal
MapBox and OpenLayers module
The MapBox tile integraton with Managing News is a working example of how you can use MapBox tiles with the Drupal Openlayers module. You can refer to the Using Mapbox Tiles in Managing News page for details on how it works. More specific documentation on MapBox and the Openlayers module will be available soon once recent development stabilizes.
MapBox and GMap module
The MapBox module for Drupal makes new map types available to the GMap module. Install the module and MapBox map types will appear on the GMap settings page. These map types can be used throughout your site just like the default map types from Google.