Martin from eOne clarifies the Extender OEM announcement. I talked to the eOne folks at the GPUG Summit and they seem excited to have the freedom to take Extender into new directions.
The eOne Dynamics GP and CRM Blog: Extender OEM
Microsoft & the GP EcosystemDevelopment & Integration
Archived post from 2012. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.