I recently looked into the relation module and i really like the massive amount of features it does offer to create relations between different entities.

But one point i am really missing here i think that is very important:

how can i create a node to be related at the same time as the relation to that node.

Example: i have a node "building". Now a want to create a number of rooms and relate them to the building. The only way i know is to create the room-nodes first and then relate them to the building via the Relation Entity Collector block. the more intuitive way would be to have a button on the edit form of the "building" node that opens the creation form of a new room-node and after i saved that room node i return to the building node form and the relation between them is automatically created.

For drupal 6 i think i found such a module: http://drupal.org/project/popups_reference

Is such a solution existing for drupal 7 and the relation module too?