SciFi MMPs: Lessons Learned
These slides form only a very small part of the panel as a whole. Most of the session is actually questions posed by Jesse Schell, the moderator. This is probably the closest thing to a postmortem for Star Wars Galaxies or Earth & Beyond out there. You should listen to the audio to get the full content.
Audio
A recording of this panel is available for free on the GDCVault.