This is the first release for Drupal 7.
Due to the way Drupal 7 handles dates the user interface of this module has changed a bit.
Drupal 7 provides the ability to create custom "date types" just like the core date types: short, medium and long. For that reason this module no longer provides the ability to display an arbitrary date format, as you can already create arbitrary formats and date types with Drupal 7 core.
For people upgrading from Drupal 6, the variable names have changed, so be sure to run update.php.
As always, please report any bugs you may find!