Export content in features using UUID features
The uuid module has been reworked, and, as of 2012.05.25, uuid_features has not been updated to address those changes (though there is a patch RTBC).

In the meantime, to export nodes using uuid_features in Drupal 7:


Install features version 7.x-1.0-rc2.
Install uuid version 7.x-1.0-alpha1. (Not the latest version.)
Install uuid_features version 7.x-1.0-alpha1.
Enable the features module, the uuid module, the uuid_node module, and the uuid_features module
Go to Configuration > System > Universally unique identifiers, and click the "Create missing UUIDs" button
Go to Structure > Features > Create feature, and from the "Edit components" dropdown, select "Content: uuid_node", then pick the nodes you'd like to export into your Feature