Exporting block settings in a Feature (Drupal 7)
You can export much more using Feature together with Strongarm and Features extra.

Strongarm gives site builders a way to override the default variable values that Drupal core and contributed modules ship with. It is not an end user tool, but a developer and site builder tool which provides an API and a limited UI.

Features extra supports: vocabularies; nodequeues (definitions); block settings; custom blocks (boxes).

Additionally UUID Features Integration provides a mechanism for exporting content (nodes, taxonomy, fields) into a features module.