In the biggest breakthrough that these products will ever be able to announce - 31-bit binary compatability between MVS/380 and z/OS is now available (for a subset of 31-bit programs, anyway). Don't let the 0.9 fool you. It would have been 1.0 but for the (nominal) beta status of the products they are built upon. Version 1.0 is now pending on the underlying products getting a new version cut. BREXX is now included in MVS/380 as well, and everything that is in MVS/380 is also in VM/380. There's also a new version of Hercules/380, which fixes some issues you're not likely to encounter now, but may be a requirement in future versions of the OSes.
You're more likely to find news on the project website than here. Or in the various MVS Yahoo groups like H390-MVS.