We have just created a new EAP release for mbeddr. You can get it at the download page. While we have called it an EAP, this is a fairly stable release that runs on the 3.0.1 version of JetBrains MPS. We are targetting a final 0.5 release for Eclipsecon next week. The code is probably ok, but we are struggling with updating the user guide in time. Keep the fingers crossed :-)