The Entity API in Drupal 7 core is a great start, but is not yet complete. That has to be changed for Drupal 8 - so get on board and help moving the API along.
Jun 13th 12:00 - Jun 15th (offical sprint day)
Sprint g.d.o discussion:
Suggested sprint topics:
- Complete the conversion of all entity types to classed objects
- Entity property API
- Unifying Entity and Field storage systems
Overview of all related issues: