That's true, unfortunately we have to move the release dates, one of the main reasons being the migrations to the newer MPS platform versions.
We've decided the release version must be based on the most recent MPS 2.0 which features better performance and memory consumption, newer underlying platform (IntelliJ IDEA 10), more language design capabilities.
Plus we're working on the bug reports and feature requests we're recieving.
We all want to release the RASE sooner, but we also want the release version to be what it should be - a fast and robust one.
The Beta based on the MPS 2.0 is coming within a week.